Skip the auto shop - Our mechanics make house calls

Q: After changing the accelerator position sensor, the car will not start.

asked by on

After changing the accelerator position sensor, the car will not start. We were told to disconnect the battery and then hold the positive and negative cables together for a minute to reset the computer. We did this and the car still would not start. We then re-connected the old sensor (without mounting it on the bracket) and still no start. Theoretically (according to the parts people) the sensor required nothing to be reset. I just hooked up a battery charger at a 2 amp charge rate and it indicated 12 volts with 40% charge. We'll see, in the morning, if a full charge changes anything. If it doesn't we are at the end of our current knowledge of what to do! Any help will be greatly appreciated. While not totally ignorant in electronics, I'm far more comfortable with the mechanical end of things.
My car has an automatic transmission.

Hi, thanks for writing in. We get this question quite often. Holding the battery terminals aren’t supposed to clear error codes stored in the ECM. The correct procedure for clearing error codes that were stored in your ECM when the accelerator position sensor was damaged, is to connect a professional digital scanner and reset the codes. This needs to be done by a mechanic that has this type of device. Contact one of our local mechanics that can show up to your home or office to complete a check engine light reset inspection for you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  • Home
  • Questions
  • After changing the accelerator position sensor, the car will not start.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have a switch toggle i believe inside the vehicle is it for the glow plug box? It makes a loud click when i hit the switch but

Hello. If the engine is not turning over and you are hearing a loud click, then it may be possible that the starter relay is faulty. The starter relay is located in the engine bay fuse box and controls power...

Q: I get P0013 and P0014. Should I take to dealer? What should I expect?

Hi, thanks for writing in. Both of these diagnostic trouble codes refer to the exhaust camshaft position sensor. There could be a problem with a camshaft position sensor, or the system that controls the timing of the exhaust camshaft. If...

Q: Cylinder heads

If you only need a complete, re-manufactured cylinder head, that will be more economical than replacing the entire engine. On your car, replacing the cylinder head is 1/6th the cost of replacing the entire engine. There is one caveat though...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...