Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the computer in your car is having trouble with the gear shifter. It's like when your TV remote has a button that doesn't work right.
The P1817 code indicates that the transmission control module (TCM) has detected a high voltage condition in the Gear Selector Lever (GSL0) circuit.
The Gear Selector Lever is responsible for sending signals to the transmission control module to indicate the position of the gear shifter. When the circuit's voltage is higher than expected, the TCM triggers the P1817 code. This can be due to electrical issues such as short circuits, open circuits, or faulty components.
• Check Engine Light illuminated
• Transmission not shifting properly
• Vehicle stuck in one gear
• Faulty gear selector lever
• Damaged or corroded wiring or connectors
• Faulty transmission control module
Gear Selector Lever: A device that allows the driver to select the gear of the vehicle.
Transmission Control Module (TCM): An electronic device that controls the transmission functions.
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the gear selector lever for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the gear selector lever if faulty.
• Replace the transmission control module if necessary.
• OBD-II scanner
• Multimeter
• Screwdrivers
$150 - $500
Moderate
• Toyota Camry
• Honda Accord
• Ford Focus
• Regularly inspect wiring and connectors for damage.
• Keep the gear selector area clean and free of debris.
• Schedule regular maintenance for the transmission system.
Sensor Issue
• Avoid forcing the gear shifter.
• Get the vehicle checked by a professional if the Check Engine Light comes on.
• Do not ignore unusual transmission behavior.
Check your vehicle's warranty coverage for transmission components.
The P1817 code has been associated with vehicles using electronic gear selectors, becoming more common as these systems are widely adopted.
Moderate – It's important to address this issue to avoid further transmission damage.
Driving with a faulty gear selector can lead to unsafe driving conditions. It is recommended to have this issue resolved promptly.
• Vehicle in park with engine running.
• Transmission in neutral with engine idling.
The gear selector lever is located in the center console of the vehicle, connected to the transmission system.
Q: Can I drive with a P1817 code?
A: It's not recommended to drive with this code as it may lead to transmission issues.
Q: How do I reset the P1817 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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