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U1204 Engine Trouble Code

Meaning of U1204 engine trouble code is : U1204 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.

U1204 Possible Solution:

U1204 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.

U1204 Code Meaning :

U 1 2 0 4
OBD-II Diagnostic Network (U) Trouble Code For Engine Fuel And Air Metering Manifold Absolute Pressure/Barometric Pressure Circuit High Input Cold Start Injector 1 Malfunction Timing Reference High Resolution Signal A Too Many Pulses

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.

U1204 OBD-II Diagnostic Network (U) Trouble Code Description

U1204 engine trouble code is about Timing Reference High Resolution Signal A Too Many Pulses.

Reason For U1204 Code

The reason of U1204 OBD-II Engine Trouble Code is Manifold Absolute Pressure/Barometric Pressure Circuit High Input.

U1204 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.