The Lemon IndexThe throttle position signal is too high.
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
Failed sensor. Then: wiring fault.
Owners named P0123 in 16 complaints to the U.S. government, most often on the Jeep Cherokee.
Cars owners report it on
Complaints that name P0123, by model. Raw counts, not a failure rate: popular models get more complaints.
The details
What P0123 means
The throttle position signal is too high.
Can I drive with P0123?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
44% of the owner complaints that name P0123 also say the car stalls or shuts off. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0123
- Failed sensor
- Wiring fault
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Stalls or shuts off: 44% of complaints
- Warning lights and electrical faults: 31% of complaints
- Brakes or ABS act up: 31% of complaints
- Loses power or goes into limp mode: 25% of complaints
Share of complaints naming the code whose text also mentions each problem.
Related codes
P0122 P0121 P0120 P0126 P0128 P0117 P0131 P0113
Quick answers
What does P0123 mean?
Throttle/Pedal Position Sensor A Circuit High. The throttle position signal is too high.
Can I drive with P0123?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
What causes P0123?
Failed sensor; Wiring fault.
Counts: NHTSA owner complaints whose text names P0123. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.