C3162 Diagnostic Trouble Code

C3162 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 C3162 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 :

Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. 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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C3162 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 C3162.

Fortunately, C3162 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3162 Trouble Code For Specific Cars

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C3162 Holden Viva Powertrain DTCs Available in Another Module
C3162 Proton 300 Fuel Restriction Indicator Circuit Malfunction
C3162 Ford Country Main Catalyst Efficiency Below Threshold (Bank 2)
C3162 Bitter Cd Brake Pedal Input Open Circuit
C3162 Hotchkiss 620 Ride Control LF Shock Actuator Circuit Open
C3162 Ferrari 550 Intake Manifold Runner Control (Stuck Open)