P085F Diagnostic Trouble Code

P085F 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 P085F diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
Poor fuel economy

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Dirty air cleaner element Damaged DPF

Repair Processes :

With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code P085F 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 P085F.

Fortunately, P085F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P085F Trouble Code For Specific Cars

P085F Velorex 16 PSP Switch Out of Self Test Range
P085F Trident Clipper Passenger Side Crash Sensor Internal Fault
P085F Daf Daffodil Gear Select position short to Battery
P085F Umm Alter Power Supply Sensor Circuit Short To Ground
P085F Gsm Flamingo Passenger Sid, Side mount Airbag Circuit Open
P085F Mercedes-benz W136 Air Suspension LF Air Spring Solenoid Output Circuit Short To Ground
P085F Mercedes R 320 Accessory Delay Relay Coil Circuit Failure