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B3123 Engine Trouble Code

Meaning of B3123 engine trouble code is : B3123 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.

B3123 Possible Solution:

B3123 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.

B3123 Code Meaning :

B 3 1 2 3
OBD-II Diagnostic Body (B) Trouble Code For Engine Ignition System Or Misfire Fuel Rail/System Pressure - Too High 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.

B3123 OBD-II Diagnostic Body (B) Trouble Code Description

B3123 engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Reason For B3123 Code

The reason of B3123 OBD-II Engine Trouble Code is Fuel Rail/System Pressure - Too High.

B3123 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.