P0170 Fuel Trim Malfunction Your Essential Diagnostic and Repair Handbook

The P0170 is defined as “fuel trim malfunction, bank1.” This is a DTC (diagnostic trouble code) that is triggered when the fuel trim in cylinder ... A fuel trim malfunction indicates that the FI system cannot fully compensate for either a rich or lean condition. The engine code seems to relate to a plausability failure. There are several subtypes listed in the manual, but they all relate to exhaust leak ... 'P0170' Fuel Trim Malfunction Bank 1 Legacy Forum. the code mean there's a vacuum leak. engine oil leak if bad enough will cause low vacuum and cause a leak code as well. P0170 means there was a malfunction in the computer's control of the air:fuel ratio. It also indicates that the fuel trims reached their limit of adding fuel. Well-Known Member ... The P0170 is based upon a rich mixture that the PCM is trying to lean out when it reached the end of its lean range. Perhaps ... 2018 Turbo S service code p0170 . ... Had bad fuel . Cleaned and flushed tank and lines, now check engine lamp on with service code p0170 that ... What's covered: a simple check for vacuum leaks, a simple remedy, how engines actually work, and fuel injection basics on an Ecotec engine ... The most common problem associated with this code is the MAF sensor or air mass meter. This is especially the case with Mercedes-Benz and Volkswagen and other ...