Can P0171 cause overheating?
First off, the first warning code you received, the P0171 code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. When the engine is lean, it runs hot, which may have caused your car to overheat.
What causes P0171?
The P0171 code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. A lean condition occurs when the engine either receives too little fuel or too much air.
What does the code p0171 stand for on a Passat?
Passat P0171 Code Defined. P0171 is an OBDII trouble code. The code technically stands for: Fuel Trim System Lean Bank 1. The code is thrown when the oxygen sensors detect that there’s not enough oxygen in the exhaust system. This is commonly referred to as a “lean” condition.
What is the trouble code on my Volkswagen Passat?
One of the most common trouble codes with the Volkswagen Passat is the P0171 code. This code number references a number that is given to you when you plug your car into a OBDII scanner.
Why does my VW Passat idle erratically?
Idle Issues – With the air/fuel mixture altered, the vehicle can idle erratically as the computer compensates to keep the engine running. This youtube video is a great resource for diagnosing the P0171 trouble code in your Passat.