Trouble Code Conditions

Condition
Diagnostic trouble code (DTC) EFI-45 Pulsed secondary air injection system (PAIR) pump) relay, signal, will be stored if there is a short-circuit to ground/supply or an open-circuit in the pulsed secondary air injection system (PAIR) pump relay signal cable.

Substitute value
Pulsed secondary air injection system (PAIR) diagnostic disabled
Front and rear heated oxygen sensor (HO2S) diagnostic disabled.
Fuel trim disabled.

Possible source

Signal too high:
- Short-circuit to supply voltage in signal cable.
- Defective pulsed secondary air injection system (PAIR) pump relay.

Signal too low:
- Open-circuit in signal cable or power cable.
- Short-circuit to ground in signal cable.
- Contact resistance in terminals.
- Defective pulsed secondary air injection system (PAIR) pump relay.

Fault symptom(s)
- Pulsed secondary air injection system (PAIR) pump may run continuously.
^ Start fault-tracing with
Other diagnostic trouble codes (DTCs) and status messages.





Other diagnostic trouble codes (DTCs) and status messages

Status messages
Select one of the following options to continue.
Alternative 1:
^ Signal too high. Permanent fault.
Alternative 2:
^ Signal too low. Permanent fault.
Alternative 3:
^ Signal too high. Intermittent fault.
Alternative 4:
^ Signal too low. Intermittent fault.