P0175

Documented for: 2.0L gasoline; 2.5L/3.0L gasoline · System(s): EMS EOBD, EMS OBD II · Factory MIL flag: 2 · Default action: ECM Default: –Bank 2 catalyst warm-up ignition retard inhibited –Bank 2 closed loop fuel metering inhibited –Canister purge inhibited –Maximum engine speed reduced

Common causes

• Restricted air filter Leaking fuel injector(s) ECM receiving incorrect signal from one or more of the following components: ECT Sensor, MAF Sensor, IAT Sensor, TP Sensor
• Restricted air filter Leaking fuel injector(s) Fuel pressure sensor failure (high fuel pressure) ECM receiving incorrect signal from one or more of the following components: ECT Sensor, MAF Sensor, IAT Sensor, IP Sensor, EFT Sensor, TP Sensor
• System Too Rich (Bank 2) - Faulty injectors
• MAF
• or fuel pressure regulator

Quick checks

• Confirm freeze-frame and conditions when the code set
• Compare live sensor values vs expected (unplugged/biased sensors are common)
• Check intake boots, PCV, and vacuum lines for splits (very common on aged X-Types)
• Swap coil/plug to another cylinder if misfire is cylinder-specific

Typical fixes

• Clean MAF
• test injectors