C2774 Diagnostic Trouble Code

C2774 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 C2774 diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Engine surge

Possible Causes :

Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
An air leak forward of the DPF will change the sensor readings resulting in the code
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

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. 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. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code C2774 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 C2774.

Fortunately, C2774 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2774 Trouble Code For Specific Cars

C2774 Ferrari 410 Intake Air Temperature Sensor 2 Circuit Low
C2774 Skoda Citigo Kick Down Switch Circuit Malfunction
C2774 Toyota Hmv Oil Level Lamp Circuit Short To Ground
C2774 Gmc Safari Park Brake Applied Warning Lamp Circuit Failure
C2774 Hyundai Elantra SCP (J1850) Invalid Data from SCLM
C2774 Bristol 403 Cooling Fan Power/Ground Circuit Malfunction
C2774 Trabant 1.1 Passenger Sid, Side mount Airbag Circuit Open