OBD-II code · Powertrain (generic)
P0510 Closed Throttle Position Switch
The dedicated closed-throttle switch (or closed-throttle bit on the TPS) does not behave as expected - either it never activates, never deactivates, or shows incoherent state against TPS voltage and engine load. Used by older systems for fuel-cutoff and idle recognition.
Is it safe to drive with P0510?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySwitch out of adjustment or worn
- PossibleTPS idle voltage offset
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.2 h
- Emissions test
- Usually unaffected
- Parts involved
- Closed Throttle Switch, Throttle Position Sensor
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.