C1386 Diagnostic Trouble Code

C1386 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 C1386 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
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)
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. 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 C1386 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 C1386.

Fortunately, C1386 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1386 Trouble Code For Specific Cars

C1386 Cadillac 60 Damper RF Circuit Open
C1386 Scion Fr-s Injection Pump Fuel Metering Control "B" Low (Cam/Rotor/Injector)
C1386 Jaguar Xka Seat Driver Rear Down Circuit Failure
C1386 Spadaconcept Codatronca Lamp Brake Warning Output Circuit Failure
C1386 Magna Steyr Mila Traction Control Valve LF Circuit Short To Battery
C1386 Maserati Spyder Transmission Mechanical Failure - First And Reverse
C1386 Hillman Super Minx PCM - IDM Communications Error