P0221high severityPowertrain
Throttle/Pedal Position Sensor/Switch B Range/Performance
on 2002 Chevrolet Express 6.0L V8 Vortec · RWD
What this code means
The secondary TPS signal is out of expected range.
Symptoms
- Check Engine Light
- Limp mode
- Erratic throttle
Common causes
- Worn TPS B
- Carbon on throttle plate
- Throttle body issue
Diagnostic steps
- Compare TPS A and B readings
- Clean throttle body
- Test TPS sweep
Repair notes
Clean throttle body or replace TPS.
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