C0189 Diagnostic Trouble Code

C0189 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 C0189 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
Diminished fuel efficiency

Possible Causes :

The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Defective ECU strategies or components will prevent proper regeneration
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

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. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code C0189 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 C0189.

Fortunately, C0189 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0189 Trouble Code For Specific Cars

C0189 Mohs Ostentatienne Battery Heater Circuit Failure
C0189 Citroen 15cv Fan Secondary Low with Low Fan On
C0189 Lagonda 3.5-litre Shift Solenoid D Intermittent
C0189 Lada Riva Shift Solenoid B Performance or Stuck Off/2-3 Shift Solenoid Valve Performance
C0189 Nissan R391 Crankshaft Position Sensor A Circuit Range/Performance
C0189 Gutbrod Superior Passenger Sid, Side mount Airbag Low resistance on Squib
C0189 Ford Crown Victoria Manifold Absolute Pressure/Barometric Pressure Circuit High Input