Question about 2000 Jeep Grand Cherokee
Check engin lite comes on car stalls coded that are recorded are P 1388 and P 1399
P1388 JEEP - ASD or CNG (compressed Gas) Relay Control Circuit
- Faulty ASD Relay (most common cause)
- Faulty CNG Relay
- ASD or CNG Relay harness is open or shorted
- ASD or CNG Relay circuit poor electrical connection
- ASD or CNG Relay poor ground or supply voltage condition
P1399 is a related to the P1388 failure.
Posted on Jun 27, 2016
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Posted on Jan 02, 2017
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