Cruze P0299 Turbocharger Low Boost - Diagnostic Tips
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- Опубліковано 12 чер 2023
- Customer states lack of power and slow acceleration. Check engine lamp on ECM code P0299 stored.
Professional diagnostic tips. How to diagnose low turbo boost using scan tool data.
#mechanic #cars #tipsandtricks #professional #engine #turbo - Авто та транспорт
dude you are the MAN!, great work.
Thank you very much! It is appreciated.
I see some changes new to old. Wastegate actuator has an adjustable arm again.
I have a 2012 with 108k miles and was an inch away from replacing turbo. went with a ZZP actuator and cleaning of rust inside wastegate pin (gritty, squeaky, movement)and back to boosting!
2016 has 33 psi boost? First gen. only 18 stock.
Yes sometimes this can be repaired with aftermarket parts.
The boost pressure sensor is reading in absolute pressure. BARO was about 14.5psi absolute, so 33psi absolute minus 14.5psi absolute BARO= 18.5psi gauge pressure.
Thanks for commenting.
Hey great tips curious what software your using I like that ability to overlay graphs
This is GDS2 the factory scan tool for 2010+ GM vehicles.
There are also several aftermarket scan tools that have the ability to do a multi-graph.
Thanks again.
Great info!! Where did you get your new turbocharger? They should be cheap since there are so many going bad.
Thank you very much! I got the turbo directly from the dealership.
Ààaaàaaa
I'm wondering why owners and or technicians don't weld or braze hairline cracks in the turbo housing.
I find that a lot of manufacturers over the years consider a cracked housing to be “normal” in service information and bulletins. Cast iron is hard to weld too. Not sure if brazing would work considering a turbo runs a lot hotter than a typical exhaust manifold.
Thanks for commenting.
The one I repaired had a cracked housing next to the wastegate flap.
I see that quite a lot and also on other turbochargers so it seems to be common.
The most common in my personal experience is exactly what was found in this video, the pins and linkages get all worn out.
@@DadsGarageDiagnosticSpecialist I have been driving forced induction since the late 90's, QC on these turbos could have been better for sure. The oil feed line and return is a joke. Thanks for posting this.
Yes, I replace the oil feed line and return pipe on every one of these jobs. They are usually clogged solid from all of the cheap oil and extended oil change intervals. Also, these cars are running tiny turbo chargers at their limit most of their lives.
Where did you do the exhaust side leak test?
I have a 2018 Cruze, I was thinking to smoke the exhaust.
On this particular engine, the turbo mounts directly to the cylinder head all as one piece with the manifold. So there really isn’t much that can leak exhaust ahead of the turbo other than the gasket at the cylinder head.
Thanks.
Where you get your turbo from? And price? I need one but I’m afraid to buy a cheap one and be back at square one. Thanks
Got it from the dealership. I would not recommend using a cheap one.
Thanks.
So what was the production date 🤔🙅🤸🍻🕐 The entire engine was redesigned mid 2016. Makes a bid difference. And how many miles 🤪on the car.That would be nice 👍 to know
Build date 4/15/2016 and the repair was done at approx. 131,602 miles…..
Has since come back twice for oil changes and no faults… last visit it had 140,407 miles.
Thank you.
Hi, have a 2014 Cruze 1.4L, P0299 code (that;s the only code), smoked the vehicle - no leaks anywhere, intake has a check valve in place, installed a new turbo charger - same code comes back within 2 days - any ideas?
If it has a new turbo and the code is not coming back immediately it could be a faulty turbocharger, boost leak, or also possibly an unrelated engine management problem.
I often see an engine misfire or otherwise engine runs poorly problem and it can cause a P0299 due it poor performance. Does the car run ok? And how is the acceleration before the P0299 code sets? Does it drive normally and have plenty of power?
Thank you.
@@DadsGarageDiagnosticSpecialist The car drives really good like there is nothing wrong with it and it was driving like that prior to Turbocharger replacement as well, it takes about 2 days for the code to set in, no misfires or even any signs that there is something wrong, plenty of power before and after the code sets in.
@@misha27060 well, the map sensor and the boost pressure sensor need to be reading accurately so that could potentially be a problem. Do you have a code reader or scan tool capable of reading data?
@@DadsGarageDiagnosticSpecialist I do, what should the correct reading be? any idea?
@@misha27060 well with the key on, and the engine off, all of the pressure sensors should be reading equally to prove that you can trust them in the first place so that is a good starting point.
Otherwise, while driving of course do this safely monitor engine load at idle, cruising, and heavy wide open acceleration.
Do the same thing with MAF and fuel trims.
So you should report back three sets of data……idle conditions. Cruise conditions. And wide open heavy acceleration conditions.
Also add MAP and Boost pressure sensor if possible. Thanks.
I dont think i can afford to fix this issue. I also have to fix the timing belt seals since its leaking. Im devested because i spent soooo much money fixing issues from this car, most rescently i fixed the oil coolan. Spent about 800$ to get that fixed. Now i have p0299 code and leaking oil from the timing belt seals.
I dont have a job and was going to rely on my car to do uber eats. This car has destryoed me mentally and physically
Well you can buy a cheap clunker that runs, drives, and stops for what it will cost you to replace the turbo and seals.
It might be worth it to invest the money if the rest of the car is in good condition… then it will be on top running condition with no leaks.
Thanks.
Hey I've got a Cobalt SS with this issue. I get 12 psi boost in first gear, which is expected i think. Then after some time in second gear it goes to 10. Then after some time in third it only goes to 5. And so on. When I get on the highway, 4th and 5th gear don't create more than 0 psi boost. What could be the issue? I don't think it is related to what gear I am in obviously, but that's just what I've observed. It's hard to do precise testing haha.
So you have a P0299 code? What year is Cobalt? Manual transmission?
Is there any other symptoms such as lack of power?
Thanks.
@@DadsGarageDiagnosticSpecialist 2009 2.0 turbo. Yeah there's a boost gauge in the car from the factory. There's lack of power after some driving some time, like when I get on the highway, go full throttle, and the reading doesn't go above 0 psi.
@awepossum1059 that’s interesting. Well you’d have to check for boost leaks, misfires, fuel supply problem, etc.
You can use a cheap code reader to monitor oxygen sensors during the problem, when you hold the gas pedal to the floor the oxygen sensors should peg rich close to 900mV. If the sensor is pegged lean closer to 0mV it’s starving for fuel.
I have a video or two demonstrating this…. Most recently the S10 video shows this.
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Thank you!
New turbo has this code sone exact engine
Check for air leaks or misfires.
Would P0299 Cause a no start condition? 2017 Trax crank but no start.
No, the P0299 would not cause a no start. Will need a diagnosis.
Thanks.
i am getting po299 turbo underboost inly in highway uphill with tempomat drive 120-140km/h. After replacing a lot od thinnga mechaniker found thath turboa turboaktuator was changed in the past but not correct adjusted. He did right and i drove 200kilometer all good. Yesterday highway after a huge traffic i started 140km/h for like a 5kilometer and PO299 was there. Now mechanic says turbo is brand new and must be “adjusted “ could that really be? Someone has installed new turbo as well but they are suspecting thath the turbo is not correctly installed and adjusted. Please help the problem is here for 5months!
The turbo adjustment is supposed to be permanent from the factory, it is a calibrated adjustment.
I would most likely have to replace the turbo with a new OEM one. Other than that you could have a misfire up hills causing it also. I’ve seen a lot of faulty ignition coils and spark plugs cause a P0299 too.
It really can only be a few things.
1. The engine has a misfire or some other reason that it isn’t able to produce enough exhaust flow and therefore low boost.
2. Air leaks. If the turbo boost is leaking the computer will see that as lower than desired boost. I would pressure smoke test for boost leaks. I’ve even seen the plastic intake manifold split and leak under pressure.
3. The turbo itself is misadjusted, worn, or for some other reason it cannot produce and maintain enough boost.
4. Some other engine management sensor is reading incorrectly and confusing the ECM…. Such as BARO sensor, MAP sensor, Boost sensor, etc.
Since your problem primarily only occurs up hills or under heavy loads id suspect air leaks or an engine misfire.
If the new turbo was not a factory part from GM I’d also highly suspect that is the problem. If I found nothing else in the end I would swap the whole turbo with a unit that has not had the adjustments tampered with.
Thanks.
Smoke test has been done multiple tines. Interkuler changed cuz was not 100% good. All of the senzors have been checked. Last time the mechanicer adjusted the turbo actuator and it functioned 2 weeks and i drive 200km without the code. Yesterday i was in traffic jam 50km and after that i drove only 5km 120-140 and the code was there right away. Ok i took today the car to the mechanic in. Budapest 220km i drove without a problem:( no code whatsoever! And he said we have to take of the turbo(which is new one-someone already installed a new one before me) and to adjust it. I wanted to know if that would really be a problem that the turbo that was replaced needs an adjustment? Plus the mechanic has found that the car Audi q5.2.0tdi was tuned and he installed new software and adjusted the turbo aktuator abd as already described the problem was gone for 200-250km. Yesterday problem was there and today i drove to him so the dame distance sae road uphill all the time 120-180km/h and the code was not there. Thank you very much
@@DadsGarageDiagnosticSpecialist
Smoke test has been done multiple tines. Interkuler changed cuz was not 100% good. All of the senzors have been checked. Last time the mechanicer adjusted the turbo actuator and it functioned 2 weeks and i drive 200km without the code. Yesterday i was in traffic jam 50km and after that i drove only 5km 120-140 and the code was there right away. Ok i took today the car to the mechanic in. Budapest 220km i drove without a problem:( no code whatsoever! And he said we have to take of the turbo(which is new one-someone already installed a new one before me) and to adjust it. I wanted to know if that would really be a problem that the turbo that was replaced needs an adjustment? Plus the mechanic has found that the car Audi q5.2.0tdi was tuned and he installed new software and adjusted the turbo aktuator abd as already described the problem was gone for 200-250km. Yesterday problem was there and today i drove to him so the dame distance sae road uphill all the time 120-180km/h and the code was not there. Thank you very much
and the Turbo has been bought brand new before i bought the car. and the mechanic says that the old owner did not adjust the turbo
If everything else has been diligently checked then yes the turbo adjustment would be highly suspect.
what kind of car
2016 Chevy Cruze. Thank you.
I just found out mine has gone bad. I'm sooooo pissed off
I’m sorry to hear you’re having turbocharger troubles.
Thanks for watching and thanks for commenting.
Same, mines gonna be $900 to fix