P285E Diagnostic Trouble Code

P285E 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 P285E diagnostic trouble code may include:

Cherry red hot catalytic converter
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Reduction in engine performance, especially at low RPM levels

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
An air leak forward of the DPF will change the sensor readings resulting in the code

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 all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve.

Process Tips

Diagnostic trouble code P285E 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 P285E.

Fortunately, P285E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P285E Trouble Code For Specific Cars

P285E Toyota Gaia Oil Change Reset Button Circuit Failure
P285E Gaz 31 O2 Sensor Circuit Malfunction (Bank 2 Sensor 2)
P285E Ferrari F1 Intermediate Shaft Speed Sensor Circuit
P285E Auburn 852 Alarm Panic Input Circuit Open
P285E Maserati Levante Transmission Fluid Pressure Sensor/Switch F Circuit
P285E Audi S6 Audio Compact Disk / Disk Jockey Unit is Not Responding
P285E Lancia Y10 STEERING Wheel Angle 1and 2 Signal Faulted