P0817 Fault Code

Starter Disable Circuit

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0817 fault code relates to the starter disable circuit, which is responsible for preventing the engine from starting under certain conditions. This system is integrated into the vehicle's anti-theft measures and ensures that the vehicle is not easily stolen. A malfunction in this circuit can trigger the P0817 code, indicating that the expected signals are not being received or transmitted correctly.

What are the symptoms of the P0817 code?

Symptoms associated with the P0817 code can vary but often include:

• Engine failure to start when the ignition is turned on.
• Dashboard warning lights, particularly the check engine light.
• Unusual behavior from the anti-theft system, such as flashing indicator lights.
• Occasional starting issues that may resolve intermittently.

What causes the P0817 code?

Common causes of the P0817 code include:

• Faulty starter disable relay or circuit.
• Malfunctioning ignition switch.
• Damaged wiring or poor connections within the starter disable circuit.
• Issues with the engine control module (ECM) or powertrain control module (PCM).
• Faulty key fob or immobilizer system problems.

How to fix P0817?

To resolve the P0817 fault code, follow these steps:

• Inspect the wiring and connectors related to the starter disable circuit for any damage or corrosion.
• Test the starter disable relay and replace it if necessary.
• Check the ignition switch for proper operation and replace if faulty.
• Diagnose the ECM or PCM for any fault codes related to the starter circuit and address as needed.
• If the issue is related to the immobilizer or key fob, reprogram or replace the key fob as required.