P1395 – OBD-II DTC

OBD-II DTC P1395 – Octane Adjust Pin Out Of Self Test Range

DTC P1395 meaning

DTC P1395 refers to a diagnostic trouble code indicating that the octane adjust pin is out of the self-test range. This code is typically associated with the engine control module (ECM) and indicates that the system has detected an issue with the octane adjustment feature, which is crucial for optimizing engine performance and efficiency.

DTC P1395 symptoms

Common symptoms associated with DTC P1395 may include:

• Check Engine Light illuminated
• Reduced engine performance
• Engine knocking or pinging
• Poor fuel economy
• Rough idling or stalling

DTC P1395 causes

Several factors can lead to the triggering of DTC P1395, including:

• Faulty octane adjust pin or circuit
• Malfunctioning engine control module (ECM)
• Wiring issues or poor connections in the octane adjustment circuit
• Incorrect fuel octane rating being used
• Faulty sensors related to engine timing or fuel delivery

DTC P1395 seriousness

DTC P1395 can be considered a moderate to serious issue. While it may not cause immediate engine failure, it can lead to poor engine performance, increased emissions, and potential long-term damage if not addressed. It is advisable to diagnose and resolve the issue promptly to maintain optimal vehicle performance.

How to diagnose DTC P1395

To diagnose DTC P1395, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1395 code.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the wiring and connectors related to the octane adjust pin for damage or corrosion.
4. Test the octane adjust pin and circuit for proper voltage and continuity.
5. Verify that the correct fuel octane rating is being used.
6. Check the engine control module (ECM) for any faults or updates.

How to fix DTC P1395 step-by-step instructions

To fix DTC P1395, follow these step-by-step instructions:

1. Clear the DTC using an OBD-II scanner.
2. Inspect and repair any damaged wiring or connectors related to the octane adjust pin.
3. Replace the octane adjust pin if it is found to be faulty.
4. Ensure that the vehicle is using the correct fuel octane rating as specified by the manufacturer.
5. Reprogram or replace the ECM if it is determined to be malfunctioning.
6. After repairs, clear the codes again and take the vehicle for a test drive to see if the code returns.

How to erase DTC P1395

To erase DTC P1395, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Access the trouble codes menu on the scanner.
4. Select the option to clear or erase trouble codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the engine to ensure the code does not reappear.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.