DTC ECM-4000

Condition







Diagnostic trouble code (DTC) ECM-4000 is stored if the control module, when driving at normal battery voltage, registers a short-circuit to ground/supply voltage in the canister purge (CP) valve signal cable or an open-circuit in the circuit.

Substitute value
Fuel trim disabled.

Possible source

Signal too high:
- signal cable short-circuited to supply.

Signal too low:
- short-circuit to ground in the signal cable
- open-circuit in signal cable
- defective valve.

Fault symptom[s]
None.