C0891 Diagnostic Trouble Code

C0891 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 C0891 diagnostic trouble code may include:

Reduction in engine performance, especially at low RPM levels
Vacuum leak on the engine
Diminished fuel efficiency
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Dirty air cleaner element Damaged DPF

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. 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. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code C0891 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 C0891.

Fortunately, C0891 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0891 Trouble Code For Specific Cars

C0891 Volvo 850
C0891 Holden Vn Pressure Control Solenoid "A" Open Circuit
C0891 Mitsubishi Rpm Aux Heater Flame Sensor Circuit Open
C0891 Ascari Fg-t Air Suspension RF Air Spring Solenoid Output Circuit Failure
C0891 Citroen Eole Fuel level Sensor Circuit Intermittent
C0891 Vernon-derby Vernon-derby
C0891 Durkopp 24 Hp Immobilizer to PCM Signal Error