C2878 Diagnostic Trouble Code

C2878 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 C2878 diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. 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.

Process Tips

Diagnostic trouble code C2878 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 C2878.

Fortunately, C2878 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2878 Trouble Code For Specific Cars

C2878 Fiat Legram Lamp Turn Signal Front Output Circuit Short To Battery
C2878 Volkswagen W12 SCP (J1850) Invalid or Missing Data for Cellular Phone / Paging System
C2878 Seat 1400 Injector Circuit Malfunction - Cylinder 3
C2878 Overland 40 Double Lock Feedback Failure
C2878 Ifa F9
C2878 Hyundai Kona
C2878 Fiat Strada Left Front Center Sensor Circuit Failure