C2890 Diagnostic Trouble Code

C2890 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 C2890 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Some aftermarket accessories and performance modifications

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C2890 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 C2890.

Fortunately, C2890 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2890 Trouble Code For Specific Cars

C2890 Acura Cl ABS Hydraulic Pressure Differential Switch Input Open Circuit
C2890 Holden Apollo Pedal Forward / Rearward Motor Stalled
C2890 Pininfarina Blmc Engine Shutoff Solenoid Malfunction
C2890 Daihatsu Mira Generator Lamp "L" Control Circuit Malfunction
C2890 Honda Thats Reverse Input Circuit
C2890 Fiat Premio Lamp Turn Signal Right Circuit Short To Ground
C2890 Holden Caprice Pedal Position Rearward Switch Circuit Short to Battery