C0087 Diagnostic Trouble Code

C0087 is a kind of OBD-II Diagnostic C-Chassis 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 C0087 diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
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
Faulty IMRC actuator relay (if equipped)

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. 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.

Process Tips

Diagnostic trouble code C0087 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 C0087.

Fortunately, C0087 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0087 Trouble Code For Specific Cars

C0087 Ac 15 A/C Refrigerant Temperature Circuit Range/Performance
C0087 Hispano Suiza Type 68 Pedal Demand Sensor B Circuit High Input
C0087 Nissan Prairie COURTESY LAMP OUTPUT Ckt Short to Battery
C0087 Chevrolet Astro Driver Door Ajar Circuit Short To Ground
C0087 Acura Tl Iv ABS Inlet Valve Coil Rear Circuit Failure
C0087 Geely Maple O2 Sensor Signals Swapped Bank 1 Sensor 2/ Bank 2 Sensor 2
C0087 Suzuki Suzulight Mirror Driver Right Circuit Open