Mar 21
P0172 Code – Engine Running Too Rich
What Does the P0172 Code Mean The P0172 code indicates that the engine control unit (ECU) has detected a fuel mixture that is too rich. This means the engine is receiving too much fuel and not enough air, which affects combustion efficiency and emissions. Modern vehicles constantly monitor the air-fuel ratio using oxygen sensors located in the exhaust system. When the ECU detects that the mixture…