The P0817 trouble code refers to the starter disable circuit. Below is an overview of this code:
P0817 Starter Disable Circuit
Code symptoms P0817.
1. Inability to start the engine.
2. Starter motor not engaging.
3. Illumination of the Check Engine Light (CEL) or Malfunction Indicator Lamp (MIL) on the dashboard.
Causes of the code P0817.
1. Faulty starter disable relay.
2. Wiring issues such as shorts, opens, or damaged wiring harnesses in the starter disable circuit.
3. Faulty ignition switch or ignition lock cylinder.
4. Malfunctioning transmission range sensor or neutral safety switch.
5. Problems with the body control module (BCM) or engine control module (ECM).
Code Solutions P0817.
1. Use an OBD-II scanner to retrieve freeze frame data and any additional stored trouble codes. This information can provide insight into when and how the malfunction occurred.
2. Inspect the starter disable relay and its wiring for signs of damage, corrosion, or loose connections. Replace or repair any damaged components or wiring as necessary.
3. Test the starter disable relay for proper operation using a multimeter or relay tester. If the relay is faulty, replace it with a new one.
4. Check the ignition switch and ignition lock cylinder for proper operation. Ensure that they are functioning correctly and sending the appropriate signals to the starter disable circuit.
5. Test the transmission range sensor or neutral safety switch to verify that it is sending the correct signals to the starter disable circuit when the vehicle is in the Park or Neutral position.
6. Perform a diagnostic scan of the BCM or ECM to check for any fault codes related to the starter disable circuit. Address any issues discovered during the scan.