Severity: High
Can damage expensive parts or affect drivability. Limit driving and book promptly.
What P2135 means
The two throttle position signals disagree. The throttle will usually go into a reduced-power mode.
Symptoms
- Reduced engine power message
- Limp mode
- Stalling
Common causes
Most likely first
- 1Dirty or failed electronic throttle body
- 2Wiring or connector fault
- 3Throttle body connector corrosion
How we diagnose it
- Check TPS1 and TPS2 voltages with a scope while sweeping
- Inspect connector
- Throttle relearn after repair
Every vehicle sets codes under its own conditions. We check the factory diagnostic steps and service bulletins for your VIN, so the repair targets the actual cause.