P0122 Code - Throttle Position Sensor/Switch A Circuit Low Input
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Technical Description
Throttle Position Sensor/Switch A Circuit Low Input
What does that mean?
A P0122 code means that the the car's computer has detected that the TPS (throttle position sensor) is reporting too low a voltage. On some vehicles that lower limit is 0.17 - 0.20 volts (V).
Did you adjust it when you installed it? If the signal value is less than .17V then the PCM sets this code. Could be an open or a short to ground in the signal circuit. Or you may have lost the 5Volt reference voltage.
Symptoms
Symptoms may include:- Rough or low idle
- Stalling
- Surging
- No/little acceleration
- other symptoms may also be present
Causes
A code P0122 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
Some recommended troubleshooting and repair steps are:
- 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.
Related P0122 Forum Topics
- codes P0122 & P0108 on a 98 buick century with a 3.1.
- 2000 jeep cherokee p0122& p0123
- p0122, car wont start
- P0122 - throttle position sensor on saturn 2001 sl1
- 1998 Saturn SL2: P0122
- P0122, P0121
- P0122 on a 2002 F-550
- P0122 on Dads 97 Crown Vic.
- 97 suburban 5.7 2 wheel drive 1/2 ton P0122 and P1122 codes
- DTC P0122 on 2001 Ford Taurus SEL
- Saturn codes: P0122 and P0133
- DTC P0122 Chevy 1998 C3500 7.4L gas truck
Need more help?
If you still need help regarding the P0122 trouble code, please post your concern in the forums.
NOTE: This information is presented for information purposes only. It is not intended as repair advice and we are not responsible for any actions you take on any vehicle. All information on this site is copyright protected. If you want to share this article or information with others, please link to this page, don't copy and paste it elsewhere.
