P0122Medium urgency
Throttle Position Sensor Circuit Low Input
Engine · Throttle Control
⚠️ Drive with caution — throttle response unreliable.
What this means
The TPS is sending a signal that is too low. The ECU may reduce power or enter a fail-safe mode. Symptoms include poor acceleration, rough idle, and possible stalling.
Likely causes
- Failed throttle position sensorMost common
- Short circuit in TPS wiringCommon
- Faulty ECMLess common
Estimated repair cost
TPS replacement$75 – $250
Wiring repair$75 – $200
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Frequently asked questions
What does P0122 mean?
The TPS is sending a signal that is too low. The ECU may reduce power or enter a fail-safe mode. Symptoms include poor acceleration, rough idle, and possible stalling.
Is P0122 serious?
Drive with caution — throttle response unreliable.
How much does it cost to fix P0122?
Repair costs for P0122 range from $75 – $250 depending on the root cause and your vehicle.
Can I drive with P0122?
You can drive short distances but should have it repaired within 1-2 weeks to prevent further damage.