For Shop Owners

P1388 JEEP - ASD or CNG Relay Control Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Faulty ASD Relay
  • 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
What does this mean?

When is the code detected?

ECM commanded on the ASD or CNG relay and detected an open or shorted condition

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
OBDII Code P1388 Jeep - ASD or CNG Relay Control Circuit -

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P1388 JEEP Comments

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Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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