Chrysler P1388 Error Code: How to Fix It

Q: What causes Chrysler P1388 error code?

The P1388 code is typically caused by a faulty auto shutdown relay, damaged wiring in the ASD relay control circuit, corroded connections, or in rare cases, a malfunctioning PCM (powertrain control module).

Q: Can I drive with P1388 code?

It's not recommended to drive with the P1388 code as it can cause sudden engine shutdown, stalling, or prevent the vehicle from starting. This creates a safety hazard, especially in traffic situations.

Q: How much does it cost to fix P1388 code?

If the issue is just a faulty ASD relay, the repair cost is typically $20-50 for the part plus labor. However, if wiring repair or PCM replacement is needed, costs can range from $200-800 depending on the extent of the problem.

Q: Will P1388 code clear itself?

The P1388 code will not clear itself as long as the underlying problem exists. The code must be cleared with an OBD2 scanner after the repair is completed, and the issue must be resolved to prevent the code from returning.

Q: What is the auto shutdown relay function?

The auto shutdown relay controls power to critical engine components including fuel injectors, ignition coils, and the fuel pump. When the PCM detects an engine problem, it can shut down these components via the ASD relay to prevent engine damage.

Abstract

The Chrysler P1388 error code indicates a malfunction in the auto shutdown relay control circuit. This relay controls power to critical engine components like the fuel injectors and ignition coils. When this circuit fails, your vehicle may experience starting problems, stalling, or complete engine shutdown.