C0911 Diagnostic Trouble Code

C0911 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 C0911 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 :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. 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. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.

Process Tips

Diagnostic trouble code C0911 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 C0911.

Fortunately, C0911 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0911 Trouble Code For Specific Cars

C0911 Tvr Se Power Limit Shutdown Fault
C0911 Holden Gts Power Door Lock Circuit Short To Ground
C0911 Hyundai H1
C0911 Suzuki Kizashi Mirror Driver Down Short To Ground
C0911 Peugeot Double Emergency & Road Side Assistance Switch Circuit Short to Ground
C0911 Zil 111 SCP (J1850) Single Ended (-) Circuit Failure
C0911 Kia Soul Ev See Manufacturer