C0016 Diagnostic Trouble Code

C0016 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 C0016 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

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)
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. 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. 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 C0016 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 C0016.

Fortunately, C0016 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0016 Trouble Code For Specific Cars

C0016 Volkswagen Golf 2 Ride Control RR Shock Actuator Circuit Open
C0016 Volvo V50
C0016 Mitsubishi Celeste Audio Rear Control Unit is Not Responding
C0016 Saturn L Immobilizer Code Word/ID Number Write Failure
C0016 Bmw M1 Clutch Actuator Circuit Range/Performance
C0016 Sunbeam Alpine Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
C0016 Volvo V40 SCP (J1850) Invalid or Missing Data for Exterior Environment