C0462 Diagnostic Trouble Code

C0462 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 C0462 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
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)
Some aftermarket accessories and performance modifications

Repair Processes :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. 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 C0462 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 C0462.

Fortunately, C0462 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0462 Trouble Code For Specific Cars

C0462 Ford Econovan MAP/MAF Throttle Position Correlation
C0462 Mazda Marathon Turbo Control Solenoid Circuit Malfunction
C0462 Plymouth Superbird Exhaust Gas Recirculation Circuit Malfunction
C0462 Dkw F91 Idle Switch (Electric Control Throttle) Circuit Malfunction
C0462 Dodge Royal Ignition Run/Start Circuit Short To Ground
C0462 Chevrolet California Driver Power Window Down Switch Circuit Failure
C0462 Honda Acty Pressure Control Solenoid B Control Circuit / Open