C1423 Diagnostic Trouble Code

C1423 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 C1423 diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
Poor fuel economy

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Dirty air cleaner element Damaged DPF

Repair Processes :

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. Now, clear the codes and test-drive the vehicle to see if the code is reset. 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 C1423 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 C1423.

Fortunately, C1423 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1423 Trouble Code For Specific Cars

C1423 Bentley 4-litre Battery Power Relay Circuit Failure
C1423 Toyota Retro Cruiser Park Brake Valve Solenoid #1 Sense Input Circuit Short to Gound
C1423 Bugatti Type 15 Cylinder #7 High To Low Side Short
C1423 Paykan Samand Driver's / Passenger's Door Ajar Output Circuit Short to Battery
C1423 Toyota Camry O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3)
C1423 Willys-overland Interlagos
C1423 Suzuki Cultus Memory Set Switch Circuit Short To Battery