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B0423 Engine Trouble Code

Meaning of B0423 engine trouble code is : B0423 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.

B0423 Possible Solution:

B0423 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.

B0423 Code Meaning :

B 0 4 2 3
OBD-II Diagnostic Body (B) 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.

B0423 OBD-II Diagnostic Body (B) Trouble Code Description

B0423 engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Reason For B0423 Code

The reason of B0423 OBD-II Engine Trouble Code is O2 Sensor Heater Circuit Malfunction.

B0423 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.