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 Bmw Serie 5 Clutch Position Sensor Circuit Range/Performance Malfunction
C0189 De Soto Firedome Hood Switch Circuit Short To Battery
C0189 Leyland Austin Theft Deterrent Fuel Enable Signal Not Received/ B+ Supply To VCRM A/C Circuit Malfunction
C0189 Fiat Grand Break Lamp Tail Output Circuit Short To Battery
C0189 Aston Martin Ulster Air Suspension Vent Solenoid Output Circuit Short To Ground
C0189 Gaz 3111 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
C0189 Mercedes-benz 320 Air Bag Passenger Inflator Circuit