DTC EFI-242

2-4-2 TURBOCHARGER CONTROL VALVE SIGNAL





Condition

Diagnostic trouble code (DTC) EFI-242 is stored it there is a short-circuit to ground/voltage or an open-circuit in the Turbocharger (TC) Control Valve circuit.

Substitute Value

- Idle air trim disabled
- Fuel trim disabled
- Conditions for fuel shut-off changed.

Possible Source

Signal too High:

- Short-circuit to supply voltage in signal cable
- Defective turbocharger (TC) control valve.

Signal too Low:

- Short-circuit to ground in signal cable
- Defective turbocharger (TC) control valve.

Signal Missing:

- Open-circuit in signal or power cable
- Contact resistance in terminals
- Defective turbocharger (TC) control valve.

Fault Symptom(s)

- Improved or impaired performance due to excessively high or excessively low boost pressure.