P1200high severityPowertrain
Fuel Pump Relay Circuit
on 2017 Lexus RC F 5.0L V8 · RWD
What this code means
The ECM detected a malfunction in the fuel pump relay or fuel pump ECU circuit.
Symptoms
- CEL
- Hard starting
- Stalling
- Poor acceleration
- No start
Common causes
- Faulty fuel pump ECU
- Open/short in relay harness
- Failing fuel pump
- Faulty ECM
Diagnostic steps
- Test fuel pressure
- Check relay operation
- Inspect wiring
- Test fuel pump current
Repair notes
Replace fuel pump relay or ECU.
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