Logo

P0423 Engine Trouble Code

Meaning of P0423 engine trouble code is : P0423 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,000 and you can't do it yourself unless you're an experienced mechanic.

P0423 Possible Solution:

P0423 Engine

Power Steering Pressure (PSP) Switch Malfunction In Key On, Engine Off Self-Test, this DTC indicates the PSP input to the PCM is high. In Key On, Engine Running Self-Test, this DTC indicates that the PSP input did not change state. Steering wheel must be turned during Key On, Engine Running Self-Test PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged.

P0423 Code Meaning :

P 0 4 2 3
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Intake Valve Control Solenoid Circuit Low O2 Sensor Heater Circuit Malfunction Turbocharger Boost Sensor A Circuit Low Exhaust Gas Recirculation Sensor B Circuit High

The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate.

P0423 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P0423 OBD-II Trouble Code The Engine Control Module ( P0423 code.

Reason For P0423 Code

The reason of P0423 OBD-II Engine Trouble Code is O2 Sensor Heater Circuit Malfunction.

P0423 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.