P237F Diagnostic Trouble Code

P237F is a kind of OBD-II Diagnostic P-Powertrain Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a P237F diagnostic trouble code may include:

Possible spark knock (detonation / pre-ignition)
Poor fuel economy
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code P237F is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before P237F.

Fortunately, P237F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P237F Trouble Code For Specific Cars

P237F Fiat 126 Knock Sensor 1 Circuit low Input (Bank 1 or Single Sensor)
P237F Peugeot Bebe Electronic Throttle Monitor Data Available
P237F Ford F-150 Memory Set Switch Circuit Short To Ground
P237F Datsun 1200 Heater Coolant Temp sensor circuit Short to GND
P237F Renault Clio Gear Shift Lock Solenoid Circuit Range/Performance
P237F Mitsubishi Airtrek Audio Compact Disk / Disk Jockey Unit is Not Responding
P237F Honda Acura Rsx Pressure Control Solenoid B Stuck On