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How can I be sure if it's my tps that's bad? - 2000 Chevrolet 2500

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A scan tool is necessary to check the TPS voltage so if tool not available have a local shop or dealer perform this. Otherwise a check engine light may be induced from the mis-adjusted TPS sensor. There is the old school way to check and your going to need a multi meter. Disconnect the wire harness from the TPS and use the multi meter to test the resistance on the TPS, as you turn the throttle up the resistance should go up as a contain value in a smooth readings without any jumps. Good luck and hope this helps, keep me posted be glad to help and why do you think there is a TPS malfunction

Posted on Jun 29, 2009

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2004 chevy can spark plugs cause scanner to read tps on a 6.0 l gas 2004 chevy silverado


It shouldn't. The TPS sensor is voltage based on throttle position. If the plugs are bad, you should get a separate cylinder misfire code only. If you are getting a TPS code, it is likely the TPS. Remember too, it is an electronic TPS, so there is a sensor on the accelerator pedal assembly that it talks to. Make sure that's plugged in. What you can do is with the vehicle in the on position (not running) - push the pedal all the way to the floor a few times. Also, clean out the throttle body and ensure there is no gunk preventing the throttle body from opening smoothly and all the way. Good Luck.

Feb 16, 2015 | 2004 Chevrolet Silverado

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My name Ilsur, I of Tatarstan , I have a jeep Grand cherokee WJ laredo 1999 4.0 error P0123 I replaced TPS but nothing helps, replaced the clockspring does not help, help me please


i had the same car.... what mileage.... 200K?
TPS errors. (its real its a real measured error)
this error is catastrophic, , meaning, not just a tad off,
the FSM covers this in details.
clock spring, the Air bag clock spring? has nothing to do with this.
or do you meant the throttle return spring, (my guess?)
the TPS output pin was discovered to have an illegal high voltage
on the output (you can be sure it idid)
spec:
TP Sensor indicated more than 4.50v for 700 ms.

caused by a bad TPS ground wire, or the output pin cut.
or the TPS internals are cracked in half (bad inside) (i have photos)
its bad TPS or bad wires to it. simple huh?
it will not be a bad ECU. as is on the list; it will not.
The jeep has great cheap TPS to buy ofter market,
on other cars not, and can cost $300 , for them
i connect my potable scope and watch the TPS output while i drive.
and find out if it is really truly bad.... hell the part, costs more than my
scope.!
be happy its not new car with throttle by wire, !!!
or the big V8 , whole new throttle body for $1000

recap. bad TPS, bad wires.

the tps on most cars are calibrated.
if you just thrown on a new TPS and not calibrate it, that is
a big failure.
here are the steps
1 key off
2 remove TPS.
3: put back new.
4:
The TPS is mounted to the throttle body. The throttle shaft end of throttle body slides into a socket in the TPS. The TPS must be installed so that it can be rotated a few degrees. (If sensor will not rotate, install sensor with throttle shaft on other side of socket tangs). The TPS will be under slight tension when rotated.
  1. Install TPS and retaining screws.
  2. Tighten screws to 7 Nm (60 inch lbs.) torque.
  3. Connect TPS electrical connector to TPS.
  4. Manually operate throttle (by hand) to check for any TPS binding before starting engine.

adjust the TPS for
0.26 volts at minimum throttle opening (idle)

worst case:
the FSM says it auto calibates
if the new TPS errors,. set it to 1/4 volt at idle.
reset ECU , all DCTs using scan tool
pull battery for 5min neg. lug (backup radio codes first)
put back lug
start engine, drive 25miles or till CEL comes on (failures)



Nov 23, 2013 | 1999 Jeep Cherokee

1 Answer

I have a code 53 tps range too high and a code 63 tps range too low is my tps bad?


One thing to check is make sure you have a steady 5v to the tps and a constant ground clear the engine computer turn the key on push the gas pedal to the floor about 50 to 100 times if your 5v does not change and you have a good ground and the code returns the tps is bad

Dec 08, 2012 | 1989 Ford Bronco

1 Answer

High idle after engine is warm. nothing is sticking with linkage.1992 chev k1500 5.7


Make sure the idle screw was not turnned causeing tps sensor to read over the spec limit, the next then is to make sure the idle air control valve is working , a bad valve will cause this problem and last is the stepper motor that controls the idle. some of these around this year used steeper idle control motors instead of idle air control valves and in turn the stepper motor is bad it will hold the throtle plate open to much causing the tps reading to be wrong triggering the engine light to come on. the steeper motor will be boltted to side of the throtlebody and theres a small arm to the throtle linkage. i will enclose a stepper motor picture and an idle air valve to show you, but this sounds like the tps is out of range due to this. the last thing is to make sure there are no vacuum leaks, spray crab cleaner around throtlebody base gasket and also the intake mounting gasket and see if the idle changes is so theres a vac leak in that area. good day. okay just did a little research and this truck does have a idle air control valve, the picture is encolsed and is screwed into throtlebody, check that and for vacuum leaks, make sure tps is good sometime it will test good when testing and go bad when it wants, you could have a bad tps and idle air control valve also.11_27_2011_9_27_54_pm.jpg

Nov 24, 2011 | 1992 Chevrolet K1500

1 Answer

Changed the TPS on my 05 sedona and it reads P0122 code on scanner, after clearing the codes the check engine light wont turn off and the codes still reads P0122, maybe a bad TPS ?


this code may cause by:

TPS not mounted securely.

TPS circuit short to ground or another wire.

Faulty TPS.

Damaged computer (PCM).

to fix this code you can try this:


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.

Aug 02, 2011 | 2005 Kia Sedona

1 Answer

96 nissan quest code p0120 p1705 the O/D flushes after startup. TPS was replaced but code still exists. Rough idle, loss of power and fuel economy.


this is an obd2 trouble code table, it can help you understand the meaning of code.
and for p0120
the Causes:
Sticking throttle return spring
MAP or TPS connector corrosion
Misrouted harness causing chafing
Bad TPS
Bad PCM
Possible Solutions:
If you have access to a scan tool, with KOEO (Key on engine off) observe the TPS voltage. With throttle closed, voltage should be about .45 volts. It should gradually sweep upwards to approximately 4.5 to 5 volts as you depress the throttle. Sometimes only a scope can capture an intermittent glitch in the TPS signal voltage. If you notice a glitch in the TPS sweep voltage, replace the TPS.
NOTE: Some TPS sensors require fine adjustment. If you aren't comfortable with using a DVOM (Digital Volt Ohm meter) to adjust the new TPS, then it's best to take the vehicle to a shop. If the voltage is not .45 volts (+or- .3 volts or so) with the throttle closed or if the reading is "stuck" then unplug the TPS connector. With KOEO check for 5 volts reference voltage present at the connector and a good ground. You can check the signal circuit for continuity by jumping a fused wire between the ground circuit of the TPS connector and the signal circuit. If the TPS reading on the scan tool now reads zero, then replace the TPS. However if that doesn't change the reading to zero, then check for an open or a short on the signal wire and if none is found, suspect a bad PCM. If manipulating the TPS wiring harness causes any change in idle, then suspect bad TPS.

Jul 11, 2011 | Nissan Quest Cars & Trucks

1 Answer

I have a 2000 ford f150 4.2 six and the overdrive transmission wants to downshift when coasting or gas is depressed at 55 and 60 mile per hour. works good all other times. the down shift is in and out many...


Start with checking the TPS, A bad TPS will cause this type of problem. Make sure that the wire harness is good and if it is, then good chance that the TPS will need to be replaced.

Feb 22, 2010 | 2000 Ford F150 Flareside SuperCab

1 Answer

My malibu stutters when i take off. Acts as if it


check this first, check the tps sensor and make sure airfilter is clean. because a bad tps has an effect on how tranny shifts. if the tps is going bad it will send the wrong info to pcm. if that does not fix it. remove and clean maf sensor. also check plugs and wires,

Nov 12, 2009 | 2004 Chevrolet Malibu

1 Answer

Low voltage tps senser.


Not likely getting a bad TPS.Your TPS runs off a 5volt reference wire.Using multimeter with key on engine off Check to make sure you have your 5volt reference check for any deformed terminals or broken wires inside insulation.

Aug 22, 2009 | 1994 Buick Regal Gran Sport

1 Answer

1997 ford crown victoria starting problems


Sounds like you're on the right track. A bad TPS and ISC motor sensor will cause the problems you're experiencing. Your ECM relies on the readings it gets from the TPS to be sure there is enough air getting to the engine. If the ECM gets a bad reading and thinks not enough air is getting to the engine, it will cut the fuel supply, hence causing your engine to die. Your ISC relies on the reading from the TPS as well. It detects from the ECM if the throttle plate is closed or not. If it thinks the throttle plate is fully closed, it will start allowing air to enter the engine and bypass the throttle plate. If your ECM starts seeing some unmeasured air coming from ISC and detects the throttle plate is open (which it may not be due to a bad TPS reading), the ECM will again cut the fuel supply to avoid the risk of detonation.

So, replace your TPS first and see if that cures your problem. Also, check the resistence readings of your ISC to be sure that is within spec. If your problem still occurs, check your Intake Air Temperature (IAT) sensor in your air filter housing. Be sure your spark plugs, plug wires, and distributor are all in good shape as well. Replace your fuel filter if you haven't done so in the past 2-3 years.
Good luck!

Jun 20, 2008 | 1997 Ford Crown Victoria

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