P0122high severityPowertrain
Throttle/Pedal Position Sensor/Switch A Circuit Low Input
on 2002 Mercedes-Benz SL 3.0L I6 · RWD
What this code means
The TPS voltage is below the minimum threshold.
Symptoms
- Check Engine Light
- Limp mode
- Engine stuck at idle
- No throttle response
Common causes
- Short to ground in TPS circuit
- Faulty TPS
- Damaged wiring
- Failed reference voltage
Diagnostic steps
- Test TPS voltage
- Check for shorts to ground
- Test 5V reference
- Inspect wiring
Repair notes
Repair short 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