P2135 — Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation
Category: Powertrain Severity: High
Updated:
DTC code P2135 means: Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation. It falls under the "Powertrain" category, with an estimated severity of High. Common causes include failed electronic throttle body, corroded throttle body connector and damaged wiring; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Failed electronic throttle body
- Corroded throttle body connector
- Damaged wiring
- Faulty pedal sensor (depending on make)
Symptoms
- Limp mode
- Car won't accelerate
- High or unstable idle
- Check engine light
How to diagnose it step by step
- Check the throttle body connector.
- Compare tracks A and B on the scan tool.
- Measure reference and ground.
- Replace the throttle body.
- Perform throttle relearn.
How to fix it
Both sensor tracks must change together. Check the throttle body connector; if it's fine, replace the throttle body and perform adaptation. Very common on Toyota, Nissan and Ford.
Estimated repair cost
Throttle body: $200–600.
Frequently asked questions
What does DTC code P2135 mean?
Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation.
Is code P2135 serious?
Severity High. Have it checked as soon as possible, especially if it affects safety or the catalytic converter.
Can I keep driving with code P2135?
Only as needed; power will be heavily limited.
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