C0112 Diagnostic Trouble Code

C0112 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 C0112 diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
Rich or lean exhaust

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.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

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. 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. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code C0112 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 C0112.

Fortunately, C0112 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0112 Trouble Code For Specific Cars

C0112 Lotus 72 Torque Converter/Brake Switch B Circuit High
C0112 Zagato Bambu SCP (J1850) Invalid or Missing Data for Tires
C0112 Acura Tl Iii ABS Inlet Valve Coil LR Circuit Short To Ground
C0112 Alvis Td21 Air Suspension Disable Switch Circuit Short To Battery
C0112 Volkswagen Sharan SCP (J1850) Communication Bus Fault
C0112 Peugeot 5008 EIC Switch-1 Assembly Circuit Short To Ground
C0112 Chrysler Viper Exhaust Pressure Sensor Low