C1312 Diagnostic Trouble Code

C1312 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 C1312 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
Lack of power

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Some aftermarket accessories and performance modifications

Repair Processes :

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. 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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C1312 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 C1312.

Fortunately, C1312 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1312 Trouble Code For Specific Cars

C1312 Wills Sainte Claire W SCP (J1850) Invalid or Missing Data for Odometer
C1312 Ford Courier Malfunction Indicator Lamp (MIL) Control Circuit Malfunction
C1312 Ford Extreme Memory Set Switch Circuit Failure
C1312 Treser Roadster Passenger Side Crash Sensor Communication Fault (Non SCP)
C1312 Ferrari F399 Internal Control Module Keep Alive Memory (KAM) Error
C1312 Chevrolet Caprice Driver Power Window Motor Circuit Short To Ground
C1312 Vernon-derby Vernon-derby