Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the P1388 Chrysler code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
ECM commanded on the ASD or CNG relay and detected an open or shorted condition
With the key on, system voltage over 10v, ASD relay commanded on, then the test started and the Powertrain Control Module (PCM) detected an open or short condition in the ASD relay control circuit. Test the ASD relay resistance (it should be 30-70 ohms).
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