Chevy Sonic - P0599 Thermostat Heater Control Circuit High
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- Опубліковано 1 кві 2017
- Electronic thermostat!?! OK then... Let's come along with Eric O. at the SMA shop as he has a look at this Chevrolet Sonic that is throwing a code P0599 "Thermostat Heater Control Circuit High"
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THANKS A MILLION!!
--Eric O.
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Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not South Main Auto Repair. - Авто та транспорт
PLEASE NOTE: THESE CRUZE/SONIC ENGINES RUN AT 227 DEGREES. DEXCOOL 50/50 MIX BOILS AT 240 DEGREES. This is not enough margin to prevent boiling as the coolant heat soaks after shut down. I fixed my boiling problem by simply draining coolant and going with straight undiluted dexcool. Now I have boiling protection up to 28 Degrees. no more boiling at all. These cruze/sonic engines run much hotter than we are all used to, and thus require undiluted dexcool, not a 50 50 mix.
These engines run this hot to meet emission standards. Thank Big Brother for this.
Just curious what engine you are referring to as they are offered with a few options. Wouldn't surprised me if you were talking about all of them, heh
As a service tech in a field other than automotive I can say that the phrase "I didn't build it, I didn't buy it, I didn't break it" applies just as well....ha!
Wanted to thank you for the lengthy explaination of the codes, you saved me so much time and parts by helping me trouble shoot the easy solutions first. Thanks
I replaced one of these on a 12 chevy cruze. Had an open in the heater circuit. Only thing to be careful of and keep in mind is the little plastic pipe on the top of the housing with the quick disconnect likes to break off ass soon as you touch it. it runs from the top of the housing to the throttle body. Then you have to go back to dealer and buy the whole pipe.
Great analysis Eric. Excellent job identifying the ECM was functioning normally. You saved the customer big bucks
Good stuff Eric. As always, your diagnostic approach is beyond reproach! Thanks!
Seen you yesterday at MechanicOC's channel, and that was fun!!
Thanks for another learning resource.
great video as always! Thanks for the all the time you spend making videos!!
Thank you man!!!! I was looking for the resistance of the heater. Great video and info, thanks again.
Great job as always. Your diagnostic approach is top notch. Thank you.
Thank you for posting this video. My sister's Cruze was giving the same code with the same engine. I will be test the resistance of that heater tonight.
I've also found just the thermostat and gooseneck, with heater by Stant. In all actuality, it wouldn't surprise me if Stant makes the OE.
This video has been very helpful with my daughter's car. Thank you.
I really wanted to see what the inside of that thermostat looked like but I realize time would be a factor in doing that. Loved your video. Thanks for the video!
This will help me a lot since I'm a new tech. Thanks Eric
The Dealer that I work for has sold a boatload (load being the operative word) of these, and I have run into this issue many times. Thankfully I am a common sense kind of tech so I also tested the way you did. Very glad I did or I may of started a side biz of selling perfectly good used ECM's. Thanks again Batman...lol. Salutations from down here in CT. The armpit of new England...
Great job of explaining as usual
Eric O
Eric O thank you for your dog on a bone persistence and expertise!
I have been watching for several weeks; viewing as many videos as possible. I hear your frustration regarding the domestic companies; hear your apparent approval with Honda and Toyota, but wondered where you stand with Kia and Hyundai. More specifically; their integrity, ease of repair, strong points and weak and overall logic of design.
Thank you for your videos!!
Todd Giambruno I just know Hyundai/ Kia has good warranty as one of my old coworkers went to work for a Hyundai dealership. He hates it and wants come back. He said its nothing but a warranty shop since warranty for Hyundai/Kia is 100k miles. I would never buy one though. Dnt think they're so terrible but not the best/ up to par with Honda/Toyota
my daughters Chevy just popped this code yesterday, definitely using this video to troubleshoot. I have a basic BT enabled code reader, so I know it is P0599, but not much else functionality.
Another good one, walked away feeling a little more educated once again, thanks!
Cool thanks!
whats up eric. great way to start a sunday. a little sma in the morning. have a good day buddy
I love waking up on Sunday morning to a fresh pot of coffee and a new SMA video!
Confuse-us say, when you do one handed resistance measurements on a Korean part, you must hold leads like chopsticks.
If a man can build a better mousetrap than his neighbor , even though he lives in the woods, the world will make a beaten path to his door - Ralph Waldo Emerson.
Thanks mate
Saved me a few min which is priceless to me nowadays
Eric this is what we deal with all day long problems like these and intermittent electrical issues at our rental car vehicle maintenance facility. Everyone thinks these new cars have zero nada zilch issues boy are they wrong. Not trying to point fingers here at any specific manufacturer but man do the "Domestic" brands fail so much. New cars right off the shipment trucks just after the PDI fail with stuff like these and other issues as well. I.E. a Dodge Journey with trans problems would shut off when put into drive.
I would not have figured this one out without you and this video. On my 2015 Sonic 1.8, I had a P0599 but I could not get the test light to light up. I went through and tested with a pigtail socket and bulb and was trying to command it with my Launch Mini ProS and it showed the same malfunction but I could not get the bulb to light which was a fairly large 921 bulb.
I went to the wiring diagram and checked the ground wire from the ecm to the thermostat for resistance and then load tested it as well and it tested good. I also tested the power wire with the test light from the power side of the circuit to the negative on the battery and it was good also. Once you mentioned the resistance values, I checked the resistance of that bulb and it was 2.5ohms and the thermostat was at 1.5ohm so I replaced the 921 with a 194 mini bulb that had a resistance of about 5 ohms, the test then worked like yours in the video and the "malfunction" on the scan tool went away and ended up being just a bad thermostat as well. You tested the new oem part and it showed 15 ohms so somewhere between 2.5 and 5ohms is the limit in the ecm resistance check on that circuit.
I installed a new thermostat and all is good! Thanks, Eric.
My 2015 Sonic 1.8 is showing the P0599 code as well , has 86,000 miles no leaks from it only a check engine light should I just replace the T Stat or the whole thing with the housing as well ?
@@davenstorm7271 Yup.
Just seen this video like 3 years to late. I work for Vauxhall in the UK. We have this engine and the 1.6 variant in most of our models and we change theses thermostats every week. You can just get the front half of the thermostat on its own without all the housing on the back. Much easier and quicker. They are crap design. Anyway love the videos whilst on lockdown. Cheers Dr O.
Hey Mr O. I had a problem with my chevy sonic. It gave a po138 code it had to do with the thermostat. Thank you for your help. I knew what to look at thanks to this video.
G'day, Eric O! Love to hear an update, on how your wonderful 2004 Honda Civic Coupe' 1.7 17DA2, is progressing along!! Thank you very much! Cheers! :-)
You just saved me a lot of trouble. I have a 12' Sonic 1.8L code P0599 going off. Checked ohms across heat element ...... 4.... Balls
LOL Mrs. O has that magic touch! @9:07
Good Video. I do want to say that they sell just the thermostat and its much simpler to change. One hose and 4 bolts.
I wish you were her in bolingbrook area. I like how you kinda already know what is wrong and yea dealers themselves will throw the most expensive part in and STILL not fix the problem example was you fuel module where they were gonna thow in a fuel pump....you most wonderful diagnostic was when you replaced the fuse box because the one section where the fuse was blown was irrepairable so you swapped out a junkyard fuse box.....I guess dealer mechanics cannot use their brains to much time and have to go by the book...what will they learn? stiffing the customer and have the person start not relying on their products. Got a new 2016 ford fusion and if it starts not blowing out hot air I will definitly remember this video.(unless dimentia hits me....runs in the family) anyway love your work and brain storming
great video , thanks for posting !!!
At the end it says if malfunction is displayed test or replace thermostat heater. Malfunction was displayed.
Eric, you should do a theory of operation segment for these new modern devices and parts.
Hi Eric, you can just buy the metal housing in the U.K., lot cheaper and quicker fix, common fault on z/a18xer engine,most dealers say you have to buy full housing!
"money lights on" or "there is your problem lady" hahaaha. unique style by eric o.
Thanks for the video man. I would have followed the flow chart lol and made a mistake...
Good video. Good information. Yes the flow charts are useless. I too wonder how many will be led astray.
My 21 year old BMW has one of those. And I replaced it twice over the last 14 years. Both times it went open with some kind of coolant temperature control curve error.
Eric, Did the same job on my Cruze (1.8L) and only replaced the thermostat component. Looks like you bought the thermostat and housing with valves and ports etc. Granted it was a $70.00 thermostat, however it came with a replaceable heating element and it was not sealed plastic like the original. It was a genuine GM component by AC.
Hi Eric that's a Vauxhall/Opel engine from here in the U.K those thermostats are renowned for giving up the ghost. Here we have an updated thermostat that has a plastic housing and doesn't need the whole unit. Also for bleeding on Vauxhall there is a bleed tap on top of the radiator on the right hand side, your passenger side. Keep up the good work.
Jon
I was suprised he could only get the complete unit instead of just replacing the thermostat itself.. it´s just bolted to the plastic housing by 3 bolts
It's the older metal thermostat in the video too, maybe that's all that is available in the U.S
I got gm to change one of their flow charts because the way it was set up it had you replace the bcm and the problem wasn't the bcm the problem was the hood latch. Regardless the vehicle was under warranty and gm would have been eating that bcm. I use a test lamp for 2 wire circuits due to the fact that diagnostics only pay 0.3 under warranty. Also the reason why the thermostat housing is aluminum on the new one is because the plastic ones always blow apart over time!
tax write-offs, blamed on techs, go figure!
All vehicles have limited time on parts. I own a 2013 Chevy Sonic and this is the first major issue I’ve had in 94000 miles of owning the car. I drive big trucks for a living and even they have a limited time on certain parts. I can say for myself that this has been one of the best vehicles I’ve ever owned. I think it boils down to how you drive and maintain the vehicle. People dog their cars and expect to get 200k+ miles out of them. I actually have a 1995 Honda Civic with over 200k that still runs great to this day. People need to drive these little cars with care and do preventative maintenance if they want them to last.
I have a lot of questions about the Chevrolet Sonk and Chevrolet Aveo .. I am a constant follower of your wonderful channel from Iraq .. Greetings to your beloved little daughter
I've said it before and I'll say it again...Eric O for president.
Just had to repair a cruze with p0599, tested as shown here, seemed straightforward that the heater was shorted (water in heater cavity and connector), replaced heater, no more codes. Sent home, and got a call 3 days later for same issue...ordered gm part to replace "new" aftermarket one figured it was a bad part, tested wiring again, but this time had voltage on the control wire too. Turned out it was shorting to another powered pin inside the ecm connector! Don't just parts swap, make sure the wiring is good! Hope this helps someone chasing their tail on what should be an easy fix.
think this is a thing that GM knows about and didn't bother to tell anyone ....ask the question why is the original part made of plastic wouldn't metal be better .....went to the parts store and just bought the thermostat because my original plastic one was reading 2 ohms. could not get the lower E10 bolt out because it was torqued on by a monkey and stripped ....went back to the parts store and exchanges it for the whole unit (made of metal ....my mind better then original ) installed it and got a MAF code and temp sensor low ....temp sensor read good 14.2 ohms however it was blowing the ecm 4 #23 10 amp fuse ...upon further investigation the power pin on the brand new unit was connected shorted to the case....thermostat body which in turn was grounded thru the housing ....is this why the original part was plastic because they knew this could be a manufacturing problem .....is this why the housing is plastic on the actual replacement part ? so that even if the coil is shorted to the casing by the thermostat the plastic housing would allow it to function correctly (isolate it from ground ) ...I honestly think that is the real story and GM chose a cheezy way to fix it
Dad worked for Fisher Body 56.4 years. /i worked for them as a temp. We both always asked WTF were the engineers thinking.
looks like im jamming a test light in mine to pass inspection! THANKS
Mrs. O's blue outfit matches all of the tool boxes.
For those looking for a recent comment. Just dealt with this, the seal inside the front thermostat housing (which also holds the thermostat itself) fails, allowing coolant into the void where the 30a heater circuit terminals reside, creating the short. The newest revision of the entire thermostat housing has been cast in aluminum for the 1.8l addressing most of the past issues on these older sonics; makes it way easier to replace just the thermostat housing. Another touch point for the sonic's is the engine coolant temperature sensor which is on the back of the engine coolant housing (the big heart thing lol) Daewoo was somewhat smart on these things. When mine went, the evap purge and intake air sensors went wonky as well.
nice just from 15 to 3 ohms that's a big difference, I did notice that is the motor is making the same sound like mine, so I guess is normal the person who sold me my chevy sonic told me the same, but when I run the test it shows me the EVA system high purge flow which is suggesting to replaced the canister purge, even when i took it to firestone they told me the same, so i will try and see. Thanks for all that info
great video
I did hope that you had come up with one of your unbelievable car shop hacks, yesterday! ;-)
I'm wondering why the fault description doesn't say "Current high or low." Instead of voltage high or low. The ecm's I'm affiliated with test current on outputs and voltage on inputs. For example if the voltage is high on inputs, it means you have an open circuit or shorted to +. If the current is high on outputs, it means it's shorted to ground. In this situation the description should have said current high because the component had only 1.5 ohms.
good info to know before i go into the dealer and they try to sell me on a new ecm. thank you
1.8 is actually big. This joke of a car called Aveo in Europe, usually comes here with a 1.4 i think :)
@ 0:07. Took the opportunity to send you a new green Jeep hat seemingly identical to the one you always wear. Should be there in a few weeks. Traveling over the big ocean. :-)
Eric needs to do a Mail Call movie while eating his lunch behind the counter with Mrs. O..
I need a car from the 60's WITHOUT all that electrical / emissions shit on it
You and me both, brother! I should've never sold my '72 El Camino 6 years ago ...
I hear ya brother... the problem is easily fixed cars make no money....☹
@@SmittySmithsonite A buddy of mine has his 66 El Camino 4 sale. Great shape.
@@billziegmond4943 - If I only had the dough. Wifey is out of work thanks to this damn virus. Perfect timing. :(
Just finished the front end this fall on our '86 Grand Marquis. Finished up the final pieces of it today (we take her off the road for the winter). Thank God I have this one! 267k miles on the original drivetrain, and fuel pump!
@@SmittySmithsonite ouch on layoff. Nice on 276k though.
Nice video. Great troubleshooting job as usual!
Would be interesting to see the internal construction of the failed unit. Seems unusual for a simple heating element to fail shorted rather than open.
What exactly is this thing needed for? Does opening the thermostat earlier reduce emissions during warmup? Then why not simply use a lower temperature thermostat? Did any of the literature explain what the PCM uses for inputs to decide when to energize the heater? Ambient air temp vs. coolant temp perhaps?
I really miss the old days.
Thank you,I work at dealership and had a hard time with the flow chart path,a ohm spec would be nice! Thank you!
That part looks fairly similar to the water pump/thermostat/coolant temp sensor on Audi's 2.0 TFSI engine. Hopefully they're more reliable. I've put water pumps on the 2.0 TFSI at 5k miles.
Mine just threw the code and measures 1 ohms, so I know what I'm replacing. Thank you!
good work top man
This DTC is common issue with this Sonic and Cruze vehicle with the 1.8l. If it has a plastic oulet where the thermostat lives its most likely the heater is bad. Theres a new design for this part and body of the part is aluminum. Its always good to diagnose first to make sure there no issue with wiring or ecm.
You know your stuff good video.....
*@**26:06* We said the same thing about heated O2 sensors, remember?
I have the Verus Pro also. Out of all the other scanners you use which one would you recommend to cover the stuff the Verus does not do. We also have an old Autel that seems to do pretty good
Was that a "Room" reference? I did NAAATTTT!
Awesome!
So as I understand it this helps maintain steady coolant temperatures under different throttle positions? At first when I saw this I thought it actually controlled the opening/closing of the thermostat. It's all about CAFE numbers.
noid lights work very well for that test
Anyone out there in UA-cam land know of a excellent honest guy like Eric O and a shop like SMA in the South Jersey area particularly Atlantic county?
They made 'progress' by mentioning a test light in the flowchart 😁
hi eric. ive just replaced the same part on a uk spec Vauxhall Vectra sri. I only got the metal part with the thermostat and sensor from dealer £60. the plastic part was sold seperatly or bundled with discount.
Good diag with a simple test light Eric O definitely looks like a Bad Thermostat being 1.5 ohms too low on-resistance super high amp and Current @SouthMainAutoRepairLLC
Off topic, but what type of lift do you use? Could you do a video teaching us about them? Never used one, looking to get one, and want to be educated. Thanks!
Great video. Looks like even the college kids at GM get it wrong from time to time.
I'm pretty sure the Cruze is a Daewoo design that GM uses since they bought them out, hence the Korean parts.
good one. looks like you prefer the autel.
Had a similar issue control circuit wise on the heater element inside the def pump on a Cummins. No resistance or current specs! Same thing let's just rip out the entire harness and check for opens and shorts with a ohm meter. Not me. Hooked up my scope to a good bus looking at voltage, control and current while going down the road,lol. Their is no no directional test for the element which I think is insane. And I'm using the factory tool too. lol.
Just replaced a bad HVAC fan resistor in my 05 Chevy pickup, old one from the factory was made in Slovenia, so yeah domestic.
So what? International trade is beneficial for both sides. And it shows that your country is capable of earning money without producing all the nitty gritty stuff and concentrate on knowledge based engineering (like complete cars). I think that is a healthy situation for the USA. Autarkism never in history brought wealth to anyone.
the light went out because Mrs.O outshines everything..
Congrats. You win the "Most cringe-worthy SMA comment" award.
Eric, you didn't say if the coolant was low when you removed it. (or I didn't hear it) Seems that not being in coolant could be a cause of failure.
GM bought out Daewoo, renamed it GM Korea. Chevy Sonic is a Daewoo car.
But mine was built right here in the US of A
I've seen you use a lot of bidirectional scanners. which do you like the most?
will the car fail emissions for this with the MIL light on
Your getting a lot of people Eric o
the parts are from where ever but those sonics are assembled in Orion Township, Michigan.
Sometimes doing something different can be the definition of insanity... I think this $176 "smart" thermostat doodad qualifies!
Good video...its unbelievable that the procedure never told you to change the thermostat first...uhh!
Hey eric. I seen you use a bulb to check driver circuits which foes against everythig they tought us at school ( screw them) due to high amp draw from bulbs could potentialy burn out a driver circuit in the pcm. Is there a safe amp limit for a driver or in your experience ever burn out or seen a burn out driver?
This is the only video I’ve seen that really explained this issue on a Chevy sonic. I have had this issue for over a year and a half. The mechanic I brought it to was recommended to me by a coworker. The guy is a hacker. Changed the water pump the thermostat and thermostat housing. After 1200$ the code still comes on he’s been trying to figure this out for a year and a half.
hey man, hope business is booming. Where about in NY are you? I'm from the oneonta area
Eric, what scan tool do you use sir? I have the OTC Encore but I really like the one you always use.
I have 2010 3.5 Honda Accord with 96000km. How often should I change spark plugs. It runs great. Thanks
Great video, I was thinking of changing mine due to code P0599 (heater control circuit high) but after watching your video I’m wondering if I could fix that by simply replacing the heating element since it comes off by removing that retainer clip. The housing itself is intact and not leaking coolant, so why should I change the whole assembly. Correct me if I’m wrong. Do you think I can fix my code by replacing the heating element?
Interesting how the auto makers are using all the sensor inputs and onboard computers to make a car more efficient. Might as well, it's like getting a free tun up every time you drive and having an engineer as a co-pilot constantly adjusting things for more efficiency and less pollution as you drive along..... when it works like it should. Eric does great explaining things I didn't know existed. I doubt I ever get a newer car but if I do this is something I didn't know about. The world is getting crowded and little things like this help us all get through another day.
I don't miss the good old days when you had to pump the gas pedal to get the car to start and keep pumping until the car finally warmed up or clearing a flooded engine. Kids nowdays don't know what they missed.
Listen to that gerbil sing 🎶