Check Engine Light - P0123
« on: September 07, 2011, 04:07:14 PM »
I was just planning to finally join a trail ride, all tire and diff issues cleaned up, and now BlueJ throws me a check engine light. Last weekend the light came on, and shortly after the jeep stalled out while on the road. Using the ignition switch method, I obtained the code "P0123". Here's what I could find on this code:
Quote
P0123 Code - Throttle Position Sensor/Switch A Circuit High Input Technical Description Throttle Position Sensor/Switch A Circuit High Input
What does that mean? A P0123 code means that the the car's computer has detected that the TPS (throttle position sensor) is reporting too high a voltage. Symptoms Symptoms may include:
Rough idle
High idle
Surging
other symptoms may also be present
Causes A code P0123 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 If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, carefully inspect all wiring and connectors that lead to the TPS. More than likely the problem is with the TPS wiring. Check the voltage at the TPS (refer to a service manual for your vehicle for this specific information). If the voltage spikes or is too high (over 4.65 volts with key on, engine off), then that is indicative of a problem. Carefully trace each wire from the TPS wiring harness to check for breaks, rubbing against other components, etc.
So what does this mean? Was the stall coincidental? I'm not sure if I want to drive it if it will continue stalling (losing power steering).
Any thoughts? I'd love to be able to resolve this issue before the Sept 17 trail ride...
(BTW, the check engince light on my Subaru came back on the same day... but with a different code)