Management Light Lit

[Wallace]

Hi all,

 

Car is a 2001 Galaxy 2.3 Ghia automatic, 38500 miles, the Engine Management light is lit after an 18 month layup and battery replacement, the old battery gave up the ghost from lack of use despite regular charging and the radio lost it's code. At first I assumed it would just be a case of resetting the codes and letting the management system gather all it's required info, but the code remains. (I will get the correct code and post later today.)

 

Upon driving the car back from the Mot, the performance felt flat on acceleration, give it full throttle away from a standing start and the car changes gear early like you are on a light throttle. Foot off in 4th gear and the car happily continues to trundle along at 35-40 mph with no engine braking so the injection shut off is clearly not working indicating a fault with the throttle position sensor as per the fault code. Is this sensor a known problem and can you dismantle it?

 

I have a copy of the TIS disc somewhere, it's in one of my "safe" places! Does anyone know what the sensor concentric with the throttle cable against the bulkhead is for and is the throttle position sensor the one conveniently placed engine side of the throttle body?

 

There are a few other faults on the car which have been there since we bought it such as the cruise control not working and an electric window fault, thanks to this site I have found information which should help in rectifying them. So from me it's a big cheers to those of you who posted in the first place, I will and add my information on fault finding in the hope it will help others.

 

Regards, Mike

[Wallace]

Checked the fault code, it is: P0122 Throttle/pedal position sensor switch A circuit low input.

 

Mike

[sepulchrave]

I'm guessing that one of the components you refer to is the idle control stepper motor and the other is the TPS, try disconnecting the TPS and cleaning up the contacts with some contact cleaner.

I can't remember if the car will run on MAF only if a TPS signal is absent or if it's the other way around.

It may be possible to remove the TPS, dismantle it and clean up the wiper contact and carbon track.

[Wallace]

I'm guessing that one of the components you refer to is the idle control stepper motor and the other is the TPS, try disconnecting the TPS and cleaning up the contacts with some contact cleaner.

I can't remember if the car will run on MAF only if a TPS signal is absent or if it's the other way around.

It may be possible to remove the TPS, dismantle it and clean up the wiper contact and carbon track.

 

 

I'm only guessing too which is why I asked before diving in and dismantling the throttle body only to find something that someone has done before. I would like to know what the unit on the throttle cable is against the bulkhead and how it works as I have removed it and it is difficult to see how it functions, the cable runs through it freely though.

 

Mike

[seatkid]

Are you looking at the wrong end?

 

I think the error code may refer to the pedal end. I would check electrical connections here, sounds as if the kickdown switch maybe showing permanently on. Also check electrical connections near the throttle body.

Edited August 9, 2008 by seatkid