![]() ![]() ![]() ![]() Since there are a number of possible root causes related to the onset of a p0171 fault code, it is important to accurately diagnose the problem at hand before moving forward with any repairs, The following process will assist you in quickly and accurately identifying the source of your trouble. Read More > What Does Error Code P0420 Mean & How Do You Fix It? However, your vehicle may experience a lack of performance, rough idle, and unresponsive acceleration.Ĭheck out this article for more information about a p0171 OBD II code and how to fix it. Many “lean” conditions do not lead to any observable drivability complaints. Such an issue can cause false readings and unreliable inputs to factory ECM software, in turn causing the ECM (engine control module) to call for incorrect adjustments in fuel and air delivery. The most common of all p0171 electrical-based faults are dirty or damaged MAF (mass airflow sensors). Some of the most common mechanical causes of a p0171 error code are dirty or clogged fuel injectors, restricted fuel delivery supply or low fuel pressure, leaking vacuum lines or PCV hoses, cracked intake ductwork, and leaking intake gaskets. ![]() Any issue, mechanically or electronically, that can cause stifled fuel delivery or unmetered air intake can lead to a lean condition. Several factors can contribute to a p0171 trouble code being set. Factory diagrams are much harder to read.Read More > What Does The Service Engine Soon Light Mean? What Caused The p0171 code (Possible Symptoms)? offers redrawn diagrams as well as factory diagrams. That saves a lot of time because you don’t have to refer back to the component locator or circuit locations. redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. If you’re tracking down a wiring issue, is the better choice. In most cases, their diagrams are right from the factory manuals. They include wiring diagrams and technical service bulletins. Remove the fender covers and close the hood.Ī and are professional-grade shop manuals-period.Connect the PCV pipe to the intake manifold.Connect the PCV pipe to the turbo inlet.Install vacuum line on to the PCV pipe with tape.Cut away tape from the vacuum line on the PCV pipe.Disconnect the PCV pipe from the turbo inlet.Disconnect the PCV pipe from the intake manifold.Open the hood and install fender covers.If the throttle position goes back to normal percentages, replace the PCV pipe following the steps below: Remove the PCV pipe from the intake manifold and put a piece of tape over the opening. If it’s less than 7% check the following:Īn area to check for this is the PCV pipe with the back pressure valve open at the turbocharger air inlet. It should be 8%-12% at idle with engine warm and AC/defrost OFF. Using live data on your scan tool, check the throttle position angle. 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 #PI0907CĮquipped with 1.4L Engine (RPOs LUJ, LUV) GM has determined that the charge air cooler duct can become disconnected from the throttle body. Service bulletin #15-NA-084: Addresses a rough engine, poor acceleration, smell of exhaust in the cabin and any of the following trouble codes. 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 #PIP5684 addresses a leak in the charge air cooler GM advises that this is a temporary fix that may have to be repeated. 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. You’re looking for any ice that may be restricting the air flow or covering related pressure sensors. Start by inspecting the air induction system including charge air cooler on turbocharged engines. The problem occurs when temps dip below 32☏ (0☌). 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. ![]()
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