Question about 1989 Buick Regal

1 Answer

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?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 11,896 Answers

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


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

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

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

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

1 Answer

Check engine light came on, went and got a diagnosis.........they said tht its either faulty TPS OR faulty ECM.....I hav no clue wat that this or how much it cost to fix ...... please help!!!!

I would think that you would realize, that
you have to find a repair shop to resolve
your issues, as you don't know the technology.

There is a big difference between a $75.00
TPS Sensor that is a common failure and an
ECM (computer) that doesn't fail hardly ever

You obviously should have had a quote
or a guess for diagnostic time and a price
for either issue

Feb 07, 2011 | 1997 Toyota Camry

1 Answer

I have an /05 Highlander. A new short block was installed @ 74,000 mi. A week later my VSC light came on. The dealer replaced the O2 sensor & light went out..for 4 miles. Now both the eng. & VSC...

The VSC has nothing to do with the O2 Sensor,TPS Sensor or EGR Valve.

I will not express what I'am thinking,but in reality,NO Diagnostic work was done
on your vehicle.

My advice,and I don't know why the pros aren't all over me yet,is never go to a dealer.
You and thousands of others on this site alone,are perfect examples of why you
go down the street, to a local repair shop that cares.
I bet if you checked your in & out milage, that they are the same. Never road
tested,nothing,just threw parts at it at your expense.
There are good techs at dealers,but no service Mgrs that care,it is all about
taking your money and selling services you don't need. On the 5th visit they will
make the drivability repair you went there for.

Common sense: asumming they pulled codes
you never have multiple sensor failures all at one time.

Nov 29, 2010 | 2005 Toyota Highlander

1 Answer

Speedometer went crazy, Engine signal, kick after full brake stop

he told you to take it to a transmission specialist because that is where those sensors are located. The speed sensor is located in the transmission. It reads the speed by counting the number of teeth on a relucter wheel. (thats the simple explanation).
I sounds to me like there might be some debri in the transmission that could be affecting the reading.
The engine computer uses that information to control the engine and transmission. Without that information the transmission could go into limp home mode and or have erratic shiffting plus other problems.
I would really suggest you get it in for a test and evaluation asap. I do not consider this vehicle to be reliable or safe because the transmission could lockup and or otherwise fail.
As a side note, these minivans are notorious for having failing transmissions and most transmission shops find that the majority of their work is on this minivans. One of the reasons I have just kept my full size van.

Apr 16, 2010 | 2001 Dodge Caravan

1 Answer

EML light went on. What is this?

Engine Management Light, same as a Check Engine Light... simply means a sensor component on your vehicle is malfunctioning You'll need to have someone with a tester to run diagnostics and retrieve codes to find exactly what the culprit is. Don't be surprised if it's the Throttle Positioning Sensor (TPS), common problem on BMWs

Jun 07, 2009 | 2001 BMW Z3

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

286 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts


Level 3 Expert

77169 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Buick Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides