What causes P0171, P0172, P0299 or P2227 on GM turbo engines?
GM has issued multiple service bulletins to address these trouble codes on the 1.4L and 2.0L turbo engines.
#PIP5540A addresses poor engine performance and P0171, P0172, P0299 or P2227 on GM turbo engines. The poor performance and trouble codes appear in cold weather and affect the GM vehicles listed below.
Vehicles affected by #PIP5540A
2000-2018 GM engines equipped with a turbo
GM has determined that restricted airflow due to ice buildup in the air induction system is the cause of the poor engine performance and P0171, P0172, P0299 or P2227 on GM turbo engines. The problem occurs when temps dip below 32°F (0°C).
Fix for P0171, P0172, P0299 or P2227 on GM turbo engines
Start by inspecting the air induction system including charge air cooler on turbocharged engines. You’re looking for any ice that may be restricting the air flow or covering related pressure sensors.
If you detect ice, allow it to melt so that the moisture can be drained from the induction system including the charge air cooler without damaging sensors or components.
GM advises that this is a temporary fix that may have to be repeated. They are working on a permanent fix.
Service bulletin #PIP5684 addresses a leak in the charge air cooler
This bulletin addreP0046, P0068, P007B, P00C7, P00E9, P0101, P0106, P0121, P012B, P0133, P0153, P015B, P0171, P0172, P0174, P0175, P0236, P0234, P0299, P026A, P0401, P0402, P0420, P0430, P04DB, P0506, P0507, P10D5, P1101, P2002, P200A, P20EE, P2227, P2263, P2457, P2459, P2463, P249D, P249E, P2598, P2599.
This bulletin applies to all 2010-2020 GM engines with a turbo and recommends checking for a disconnected air charge cooler connection or a charge air cooler leak before checking anything else.
Service bulletin #15-NA-084: Addresses a rough engine, poor acceleration, smell of exhaust in the cabin and any of the following trouble codes. P0101, P0299, P2002, P2263 OR P2463 on 2014-2015 Chevrolet Cruze vehicles with the 2.0L diesel engine.
GM has determined that the charge air cooler duct can become disconnected from the throttle body. Replace the charge air cooler duct and inspect the throttle body connection
GM service bulletin #PI0907C addresses a check engine light and a P1101 trouble code
Models affected by #PI0907C
2013-2017 Buick Encore
2011-2016 Chevrolet Cruze
2012-2016 Chevrolet Sonic
2013-2017 Chevrolet Trax
Equipped with 1.4L Engine (RPOs LUJ, LUV)
Using live data on your scan tool, check the throttle position angle. It should be 8%-12% at idle with engine warm and AC/defrost OFF. If it’s less than 7% check the following:
An area to check for this is the PCV pipe with the back pressure valve open at the turbocharger air inlet. Remove the PCV pipe from the intake manifold and put a piece of tape over the opening. If the throttle position goes back to normal percentages, replace the PCV pipe following the steps below:
- Open the hood and install fender covers.
- Remove the air cleaner outlet duct.
- Disconnect the PCV pipe from the intake manifold.
- Disconnect the PCV pipe from the turbo inlet.
- Remove the PCV from the retainers.
- Cut away tape from the vacuum line on the PCV pipe.
- Remove the PCV pipe.
- Install the new PCV pipe.
- Install vacuum line on to the PCV pipe with tape.
- Install retainers to the PCV pipe.
- Connect the PCV pipe to the turbo inlet.
- Connect the PCV pipe to the intake manifold.
- Install the air cleaner outlet duct.
- Remove the fender covers and close the hood.
Posted on by Rick Muscoplat