P1613
MIL Request Signal Circuit High Input
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$6–56 (est.)
Symptoms
- Check Engine Light Is Constantly On
- The Check Engine Light does not come on when the ignition is turned on.
- Inability to read fault codes
- Car diagnostic problems
Causes
- Short circuit to positive in the MIL signal circuit
- Engine control unit (ECU) malfunction
- Wiring harness damage
- Problems with contacts in connectors
- Corrosion in electrical connections
How to Fix
- Test the MIL signal circuit for a short to positive.
- Inspect the wiring harness for damage
- Check the contacts in the ECU and dashboard connectors
- Test ECU operation
- Replace damaged wires or connectors