Is It Safe to Drive With a P2135 Code?
Common Symptoms of a P2135 Fault
Limp mode — severely reduced power
EML on
Erratic throttle response
Hesitation or surging
Possible Causes of P2135
A P2135 code can be triggered by faults across several systems. Identifying the exact root cause requires proper diagnostic equipment and live data — not just reading the code.
TPS Wiring Fault
Wiring to one or both TPS sensors is damaged causing divergent readings.
TPS Sensor Failure
One of the two throttle sensors has failed.
Throttle Body Fault
A fault within the throttle body causing one sensor to read differently.
ECU Calibration Fault
The ECU's sensor calibration has been lost — may need resetting.
Why we don't list the exact part: A P2135 code tells you what's happening but not why. Replacing parts based on the code alone is the most common way drivers waste money. A proper diagnosis identifies the specific cause first.
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P2135 and Your MOT
A stored P2135 fault code will cause your car to fail its MOT. The engine management light will be illuminated during the test — an automatic failure under current MOT standards. Even if the light temporarily clears, the code remains in ECU memory and can be read by testers.
Get the fault diagnosed and repaired first, then have the code cleared and confirm the light stays off before booking your MOT.