C2826 Diagnostic Trouble Code

C2826 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 C2826 diagnostic trouble code may include:

Lack of power
Faulty O2 Sensor
Poor acceleration
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C2826 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 C2826.

Fortunately, C2826 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2826 Trouble Code For Specific Cars

C2826 Italdesign Twenty Seat Belt Switch Circuit Failure
C2826 Morris Fourteen Brake Pedal Switch Circuit Malfunction
C2826 Maserati 124 Transmission 4-Wheel Drive Mode Select Short Circuit To Ground
C2826 Nissan 370z CID Low
C2826 Toyota Porte Park / Neutral Switch Input Circuit
C2826 Lamborghini Jalpa Signal Link Fault (Non SCP)
C2826 Pontiac Firebird Exhaust Pressure Sensor Range/Performance