Engine-CodesChrysler – P1388 Chrysler

P1388 Chrysler Code - ASD Relay Control Circuit Conditions

Quick Answer

The P1388 diagnostic trouble code for Chrysler vehicles relates to the ASD (Automatic Shutdown) relay control circuit conditions. Common causes include Faulty ASD relay, Damaged or corroded wiring in the relay control circuit, Defective powertrain control module (PCM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1388 Chrysler indicates ASD Relay Control Circuit Conditions.
Common causes
Common causes include Faulty ASD relay, Damaged or corroded wiring in the relay control circuit, Defective powertrain control module (PCM).
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1388 Chrysler Description

The P1388 diagnostic trouble code for Chrysler vehicles relates to the ASD (Automatic Shutdown) relay control circuit conditions. The ASD relay is responsible for providing power to essential engine components such as the fuel pump, ignition system, and injectors. When this code is triggered, it indicates that there is a fault in the circuit controlling the ASD relay, potentially leading to issues with starting the engine or overall engine performance.

OBDII Code P1388 Chrysler - ASD Relay Control Circuit Conditions
P1388 Chrysler Code - ASD Relay Control Circuit Conditions

Common Causes of P1388 Chrysler

  1. Faulty ASD relay
  2. Damaged or corroded wiring in the relay control circuit
  3. Defective powertrain control module (PCM)
  4. Loose or poor electrical connections
  5. Environmental factors such as moisture or debris affecting the circuit

Symptoms of P1388 Chrysler

  1. Engine stalling or difficulty starting
  2. Reduced engine performance
  3. Check engine light illuminated
  4. Rough idling or misfires
  5. Poor fuel economy

How to Fix P1388 Chrysler

  1. Diagnose the issue using a scan tool to verify the P1388 code and identify the specific cause.
  2. Inspect the ASD relay and associated wiring for any signs of damage or corrosion.
  3. Test the powertrain control module (PCM) to ensure it is functioning correctly.
  4. Repair or replace any faulty components, such as the ASD relay or damaged wiring.
  5. Clear the diagnostic trouble codes and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P1388 Chrysler

The cost of repairing a P1388 code can vary depending on the specific cause of the issue. Typically, replacing an ASD relay can cost between $50 to $150, while addressing wiring or PCM problems may incur higher costs. Labor rates at auto repair shops can range from $80 to $150 per hour, and additional diagnostic time may be necessary to pinpoint the exact cause of the issue. Therefore, the total repair cost for this code could range from $150 to $500 or more, depending on the extent of the repairs needed. It is recommended to consult with a certified mechanic for a more precise estimate based on your vehicle's make and model.

When is the Code Detected?

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

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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