New Q45 Owner, Need some SES help.

[Anonymous User]

Hello Everyone,

I recently purchased a 1997 Q45, it drives and ride like no other car i have driven. and so far in the day I have owned it I'm really liking it. Right now it reads at 155k

As with some used cars it has some stuff that needs to fix for it to be comfortable to my driving standards.

Right now, it has the following cluster lights lit up. TCS off, SLIP & Service Engine soon light.

I scanned the car with a friends scanner, I got the following codes.

P0120 - Throttle Position Sensor
P1120 - Throttle Position Sensor 2

Something I noticed on my drive home, is that sometimes the idle would go up to about 1500rpm for no reason and slowly come down, it would also do it sometimes when i start it also. Also on the freeway it seems like it needed more throttle then necessary to accelerate.

With some common sense and the car repair experience I have, I'm thinking. The TCS and SLIP light are lit up because the car cant sense the throttle position sensor, due to it throwing the code for them and the possibility of them being bad? So it override the system and turned them off?

And if I'm correct there is 2 TPS?

Also what would cause my odometer to not work? My MPH and RPM and all other gauges work fine, but my odometer doesnt work or go up at all.

A list of maintance items i want to do besides fix these problems are these.
Fuel filter
Spark Plugs
Knock sensors
Plenum cleaning

anything else I should ad to the list?

Thanks for your help.

[loystock]

P0120 is covered, starting on page EC-141 - http://www.nicoclub.com/FSM/Q45/1998_Q4 ... Q45/ec.pdf

[maxnix]

Check battery condition (deep discharge) and alternator output (stress test) first to eliminate electrical insufficiencies.

[Anonymous User]

P0120 is covered, starting on page EC-141 - http://www.nicoclub.com/FSM/Q45/1998_Q4 ... Q45/ec.pdf

Thanks I will try that.

I also did the battery & alternator load test, and it passed.

Another thing that happened today, when i was sitting in the car idling while I was using the scanner to read the live data from the car. The car was at around 925rpm, and all of a sudden it just stalled out and shut off. I turned it back on and it almost did the same thing, but the rpms went back up to idle.

I also noticed when i was parked and was reading the live data from the scanner the throttle % did no go up when I would press the accelerator.

[maxnix]

Plenum ever been off to be cleaned? I bet you have some surprises!