What is Engine code P0170?
What the P0170 code means. The P0170 code means that the powertrain control module is detecting a fuel trim that is outside the range of specification set by the vehicle’s manufacturer. This can mean a negative fuel trim or a positive fuel trim has been detected.
What does Bank 1 fuel trim malfunction mean?
Error Code P0170: Fuel Trim Malfunction (Bank 1) Error Code P0170 is described as Fuel Trim Malfunction Bank 1. This means the PCM (powertrain control module, also known as ECM or engine control module) has detected a fuel trim outside the specified range set by the vehicle’s manufacturer.
What causes a fuel trim malfunction in a Mercedes?
Potential causes include a vacuum leak, unmetered air leaks Fuel saturated engine oil Leak in turbo air charge hoses (if equipped) Possibly bad O2 sensor (If Mercedes, may require adaptation with M-Benz compatible scan tool.) Oil contamination in MAF connector or O2 sensor connectors.
What is the PCM error code for fuel trim?
When the fuel trim reach its limit, the PCM will set the error code, indicating a malfunction in fuel trims. It can also be the same malfunction but on Bank 2, which would be error code P0173. Symptoms for Error Code P0170 may vary depending on the make of the vehicle.
What is the OBD code for fuel trim?
Code P0170. Hi, thanks for writing in. The OBD-II Error Code P-0170 indicates that the powertrain control module is detecting a fuel trim that is outside the range of specification set by the vehicle’s manufacturer.
Potential causes include a vacuum leak, unmetered air leaks Fuel saturated engine oil Leak in turbo air charge hoses (if equipped) Possibly bad O2 sensor (If Mercedes, may require adaptation with M-Benz compatible scan tool.) Oil contamination in MAF connector or O2 sensor connectors.
What is the diagnostic code for fuel trim malfunction?
P0173 is a diagnostic trouble code (DTC) for “Fuel Trim Malfunction (Bank 2)”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.
Where is the fault code stored in a Mercedes Benz?
This fault code is stored in the Engine Control Module (ECM) when the ECMis no longer capable of controlling the air fuel ratio. For correct operation of the catalytic converter the ECMis required to keep the air fuel ratio (AFR) at approximately lambda 1, this equates to an AFR of 14.7:1 by mass.
What does fuel trim mean on an ECM?
Fuel trim is what the ECM implements to adjust the air-fuel ratio of the engine according to changing driver conditions. The air-fuel ratio should stay at, or very near to 14.7:1.