QuestionQUESTION: Hi Autohelp.... I talked to you last week about this car and it's dieing and you advised, from the codes, for me to replace the left oxygen sensor, which I did today, and I also replaced the battery. The codes I am getting now are :IPC U1255C; PZM B1552H ; RSS 1738C,1783C,1785C...and that is all...I have tried to clear these codes and they won't go...the car is actually running now, thanks to you, but I'm still leary of taking it out anywhere...All of the other codes have been cleared and not reappeared as of today...
ANSWER: You need to clear the rest of the codes via the climate control panel also.
If you look thru my PAST ANSWERS TO OTHERS you will find the procedure for your specific YEAR and MODEL vehicle.
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QUESTION: I have tried repeatedly to clear the last 5 codes, but they will not leave...and I am using the climate control.
ANSWER: Tell me the steps you are using to clear these codes.
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QUESTION: I clear one set of codes and or code, turn the key off, wait 3 minutes...then turn key to on...bring the on board up..let it run until PCM? then go to the next code/codes...and clear...until I have gone thru my whole list of codes...these last ones have been persistant and do not clear...
AnswerIPC U1255C = Class 2 initilization error which means that there is a loss of communication between the modules that run different items on the vehicle.
PZM B1552H = Battery was disconnected from vehicles electrical system.
RSS 1738C = Road sensing suspension automatic level control exhaust solenoid valve has a short to ground.
RSS 1783C = short to ground in the module.
RSS 1785C = Short to ground in the module.
This is a very unusual condition and will require the use of a diagnostic scanner to determine which module is NOT receiving the CLASS 2 signal from the numerous modules contained within the vehicle.
Have you had any kind of work performed on the vehicle at all in the last 6 months.
ANY type of repair may give me a clue as to which module is at fault.
If you have had NO work performed on the vehicle, You will need an eloectronic scanner to test each module to see which one is not receiving the class 2 signal.
