P0121high severityPowertrain
Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance
on 2001 BMW 525i 2.5L I6 M54 · RWD
What this code means
The TPS signal does not match expected values for the current operating conditions.
Symptoms
- Check Engine Light
- Erratic throttle response
- Stalling
- Hesitation
- Limp mode
Common causes
- Worn TPS
- Carbon buildup on throttle body
- Sticking throttle plate
- Loose throttle cable
Diagnostic steps
- Monitor TPS signal during throttle sweep
- Check for flat spots or dropouts
- Clean throttle body
- Inspect throttle cable/linkage
Repair notes
Clean throttle body. Replace TPS if signal is erratic.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1