C2770 Diagnostic Trouble Code

C2770 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 C2770 diagnostic trouble code may include:

Poor fuel economy
Possible spark knock (detonation / pre-ignition)
Misfire
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.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

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. 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 C2770 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 C2770.

Fortunately, C2770 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2770 Trouble Code For Specific Cars

C2770 Fiat 131 Knock Sensor 2 Circuit Low Input (Bank 2)
C2770 Sunbeam 4-litres Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
C2770 Mg Pa Air Suspension Warning Lamp Circuit Short To Battery
C2770 Chevrolet Prizm EIC Switch-1 Assembly Circuit Open
C2770 Ford Courier Malfunction Indicator Lamp (MIL) Control Circuit Malfunction
C2770 Mitsubishi Outlander Aux Heater Blower Fan Circuit Open
C2770 Rambler Classic Fuel Temperature Sensor U Circuit Low Input