C0187 Diagnostic Trouble Code

C0187 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 C0187 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. 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. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.

Process Tips

Diagnostic trouble code C0187 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 C0187.

Fortunately, C0187 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0187 Trouble Code For Specific Cars

C0187 Alfa Romeo Giulietta AG4 Transmission Torque Modulation Fault
C0187 Pontiac Montana Fan Relay (High) Circuit Malfunction
C0187 Toyota Altezza Not in P or N During KOEO / KOER
C0187 Nissan Pino Cooling Fan Circuit Over Current
C0187 Spyker C8 Lamp Dome Input Circuit Short To Battery
C0187 Austro-daimler 27 Aux Heater Blower Faulted
C0187 Fiat 507 Lamp Backup Switch Input Circuit Open