p0121
Moderate
Lexus · SUVs
Throttle/Pedal Position Sensor/Switch B Range/Performance
Quick Answer
Error code P0121 on your Lexus SUVs means: Throttle/Pedal Position Sensor/Switch B Range/Performance. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Inspect accelerator pedal sensor connectors
2
Test pedal sensor resistance through full range
3
Clean throttle body with appropriate cleaner
4
Check wiring for continuity and resistance
5
Perform accelerator pedal calibration
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
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