Question about 1989 Buick Regal

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Went to get free diangostics and told me about tps sensor

I went to the shop and they told me 2 things popped up on diagnostics:
p1650 qdm 2 failer
p0122 tps sensor
what are these problems? and how much to fix?

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TPS is Throttle Positoin Sensor which is located on top of motor where throttle cable attaches. The sensor is there.

QDM is quad driver which a part of the Electronic Control Module (ECM) The ecm itself may need to be replaced.

Posted on Mar 31, 2009


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2 Answers

Starts and runs fine until accelerating to about 2500rpm then cuts off. why?

make, model, year?
get trouble code from auto parts store that will do it free
suspect tps (throttle position sensor) if scanner found none
other suspects: vehicle speed sensor, engine revolution sensor, ecm or pcm

Oct 14, 2015 | Cars & Trucks


Replacing Throttle Position Sensor on 2004 kia sorento

My issue was my Engine light came on and I went to Autozone and O'reilly's to have them scan why my engine light came on and they told me it was putting up Error Code P0122. Looking at some forums and post was able to fix my issue on my own. Now if you replace your TPS module and the issue has not cleared you can move on to the next step in troubleshooting your error code, but in my instance the replacement fix'd mine. Here is the process I used which took about 10-15min and saved me about $300;

1. Obtain new part (I ordered my OEM part from ebay $30-$60)
2. Disconnect battery,Positive side.
3. mark the current position with a sharpie or something, you want to install in the exact position the original one was in before removing. (take a pic with your phone).
4. Disconnect the wire to the TPS module/unit.
5. Unscrew the unit (should be x2 screws, note how tight the screw is, you'll need to put same tightness when re-applying screws).
6. Put new Module/Unit in place matching the original position of the old one, just line up where you made the marks and secure with screws.
7. re-connect the wire back to the TPS module/unit.
8. re-connect battery.
9. start your car and your done.

Your check engine light should be off now for code P0122. if still on, it may be another code and if so continue troubleshooting the other codes/issues. This process resolved my Error Code P0122.






on Nov 16, 2015 | Kia Sorento Cars & Trucks

1 Answer

It's a 1995 Saturn sl the clutch on ac compressor kicks on with direct power the engine fan also changed relays still get the code 26 quad drive modal need some help

This info is from 1998 Saturn Sl , my service info doesn't go to 95 . It's the same except for code numbers , My info is P0xxx #'s . The quad driver is part of the ECM - engine computer !
Here is a description from Saturn service info .
A quad driver module (QDM) is an electronic switch which completes a ground circuit when switching ON. The QDM independently controls 4 separate outputs. A load is connected between battery voltage and the QDM allowing the QDM driver to control the output. Each QDM has fault detection logic which compares QDM driver input and output voltages. The logic expects to measure less than 3 volts when the QDM driver is ON and greater than 7 volts when OFF. The QDM has only one fault line that will detect a fault on any of the 4 outputs. The scan tool can be used to cycle the outputs ON or OFF. The scan tool can also perform an automated test which can isolate the faulty circuit.
The quad drive it self may be bad , GM had a problem with these !
Did you check fuse's ?
Conditions for Setting the DTC
DTC P01650 and/or P1651 will set if:
There is an open, short to ground or short to voltage on any of the QDM output circuits

MIL (SERVICE ENGINE SOON) telltale circuit

Upshift lamp circuit

Cooling fan relay circuit

A/C relay circuit

Fault detected for 5 seconds for DTC P1651. Fault detected for 20 seconds for DTC P1650.

Important: The QDM circuit is continuously checked when the engine is running.

May 18, 2015 | 1995 Saturn Sl

2 Answers

Po 122 problem light on had changed sensor problem not fixed trans not shifting right horrible jurks when it shifts.

P0122 is TPS signal low, which could mean you have a bad TPS, or a fault in the wiring or connector. I suspect a bad Throttle Position Sensor.

Apr 08, 2015 | 2000 Subaru Outback

1 Answer

2000 GMC Jimmy ran fine stopped at a light and went to take off but couldn't accelerate and sounded like timing was going way out as it was bogging.Vehicle will idle all day but randomly wont accelerate...

Hi there u dont mention if twhat is the right code. U must undrstand what is the really name of the code which is very important to know ..some codes explained like this TPS low voltage or circuit or TPS performance..or TPs circiut thing u should take note that Apps. .or acc pedal position sensor should be also one of the problem. U need to double check the electrical

Aug 10, 2013 | Cars & Trucks

1 Answer

Check Engine light issues

change the evap sensor the location of the sensor should be on a sticker schematic under your hood

Aug 27, 2012 | Cars & Trucks

1 Answer

2002 nissan pathfinder hesitates on exceleration. have replaced o2 sensors on both sides , plug , ect. replaced timing sensor. what else could i check?

It sounds like you have a faulty TPS (throttle position sensor) sensor, it is an easy fix, and you can get the part from any auto parts store. The TPS sensor is located on the throttle body, and it is held in place with 2 screws and has 1 plug to it. Before you change it, make sure that it is plugged in. Mine did the same thing and somehow the TPS had came unplugged, so I plugged it back in and the issue went away.

Mar 18, 2011 | 2001 Nissan Pathfinder

2 Answers

I have a service code of po122tpr can you tell me about how much this will cost to fix.

P0122 Code - Throttle Position Sensor/Switch A Circuit Low Input
A P0122 code means that the the car's computer has detected that the TPS (throttle position sensor) is reporting too low a voltage. On some vehicles that lower limit is 0.17 - 0.20 volts (V).

Did you adjust it when you installed it? If the signal value is less than .17V then the PCM sets this code. Could be an open or a short to ground in the signal circuit. Or you may have lost the 5Volt reference voltage.

Symptoms may include:
* Rough or low idle
* Stalling
* Surging
* No/little acceleration
* other symptoms may also be present

Causes: A code P0122 may mean that one or more of the following has happened:
* TPS not mounted securely
* TPS circuit short to ground or another wire
* Faulty TPS
* Damaged computer (PCM)

Possible Solutions: Some recommended troubleshooting and repair steps are:
* Carefully check the throttle position sensor (TPS), wiring connector, and wiring for breaks, etc. Repair or replace as necessary
* Check the voltage at the TPS (refer to a service manual for your vehicle for specific information). If the voltage is too low that is indicative of a problem. Replace if necessary.
* If recently replaced the TPS may need to be adjusted. On some vehicles the installation instructions call for the TPS to be properly aligned or adjusted, consult a repair manual for specifics.
* If there are no symptoms at all, the problem may be intermittent and clearing the code may resolve the issue temporarily. If this is the case then you should definitely check the wiring to be sure it's not rubbing on anything, grounding, etc. The code may come back.

Aprox US$ 150.00, check in this link the replacement parts and some tips about DIY:

Hope this helps (remember to rate and comment this answer).

Mar 09, 2011 | 2000 Chevrolet S-10

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