C2669 Diagnostic Trouble Code

C2669 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 C2669 diagnostic trouble code may include:

Poor fuel economy
Possible spark knock (detonation / pre-ignition)
Misfire
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
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. 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.

Process Tips

Diagnostic trouble code C2669 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 C2669.

Fortunately, C2669 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2669 Trouble Code For Specific Cars

C2669 Renault 5 Gear Lever X Position Circuit Intermittent
C2669 Volkswagen Lt Right Rear Backup Lamp Circuit Failure
C2669 Dodge Avenger
C2669 Daihatsu Consorte Gear Shift Module Communication Circuit
C2669 Datsun Pulsar HO2S Heater Control Circuit (Bank 2 Sensor 3)
C2669 Peugeot Rifter Engine Oil Pressure Sensor/Switch Circuit Malfunction
C2669 Hotchkiss Anjou Ride Control LF Shock Actuator Circuit Short To Ground