Engine Error
P0121
Throttle Position Sensor (TPS) Range/Performance
Severity
Medium
Symptoms
Sudden surging, hesitation, transmission shift issues
Common Causes
- Worn TPS sensor
- Dirty throttle body
- Corroded connector
- Bad TPS wiring
How to Fix
- 1 Clean throttle body
- 2 Replace TPS sensor
- 3 Repair connector
- 4 Perform sensor calibration
Estimated Repair Cost
USD
$80
–
$300
TPS sensor: $50 - $150; Labor: $80