P1388 Jeep Code - ASD or CNG Relay Control Circuit
Quick Answer
The P1388 Jeep diagnostic trouble code (DTC) refers to an issue with the ASD (Auto Shut Down) or CNG (Compressed Natural Gas) relay control circuit. Common causes include Faulty ASD or CNG relay, Wiring harness issues, Poor electrical connections. 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 Jeep indicates ASD or CNG Relay Control Circuit.
- Common causes
- Common causes include Faulty ASD or CNG relay, Wiring harness issues, Poor electrical connections.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1388 Jeep Description
The P1388 Jeep diagnostic trouble code (DTC) refers to an issue with the ASD (Auto Shut Down) or CNG (Compressed Natural Gas) relay control circuit. This code typically indicates a problem with the relay circuit that controls the ASD or CNG relay, which are crucial components in the vehicle's electrical system. The ASD relay is responsible for supplying power to essential engine components such as the fuel injectors, ignition coil, and oxygen sensors, while the CNG relay controls the flow of compressed natural gas in vehicles equipped with CNG systems.
Common Causes of P1388 Jeep
- Faulty ASD or CNG relay
- Wiring harness issues
- Poor electrical connections
- Defective powertrain control module (PCM)
- Environmental factors such as moisture or corrosion
Symptoms of P1388 Jeep
- Engine misfires
- Stalling or rough idling
- Poor acceleration
- Illumination of the Check Engine Light
- Difficulty starting the engine
How to Fix P1388 Jeep
- Begin by conducting a thorough visual inspection of the wiring harness and relay components to check for any visible damage or loose connections.
- Use a multimeter to test the continuity and voltage of the ASD or CNG relay circuit to determine if the components are functioning correctly.
- If the relay is found to be faulty, replace it with a new, OEM-approved relay to ensure proper operation.
- Clear the diagnostic trouble codes from the vehicle's computer using a diagnostic scan tool to reset the system and monitor for any recurring issues.
- Test drive the vehicle to verify that the symptoms associated with the P1388 code have been resolved and ensure proper engine performance.
Cost to Fix P1388 Jeep
The typical repair costs for addressing the P1388 Jeep code can range from $100 to $300, including parts and labor. However, it is essential to note that the specific diagnosis time and labor rates at auto repair shops can vary depending on various factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships and lower at independent shops. It is advisable to obtain quotes from local shops for a more accurate estimate.
When is the Code Detected?
Need more information about the P1388 Jeep code?
Need more information on how to fix the P1388 Jeep code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1388 Jeep code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1388 Jeep Code
No Frequently Asked Questions about P1388 Jeep Code found.
Discuss the causes and fixes for P1388 Jeep OBDII Code
Code P1388 Jeep comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.