Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer thinks there's a problem with the sensor that tells it when the car is in neutral. It's getting a signal that's too strong.
The P086D code indicates that the transmission control module (TCM) has detected a high voltage signal from the neutral position sensor circuit.
The neutral position sensor is responsible for informing the TCM of the gear position. A 'circuit high' condition means the voltage reading from the sensor is higher than expected, which could be due to a wiring issue, a faulty sensor, or a problem with the TCM.
• Check Engine Light is on
• Transmission may not shift properly
• Vehicle may not start if the neutral position is not detected
• Faulty neutral position sensor
• Wiring issues such as short to voltage
• Faulty transmission control module (TCM)
TCM: Transmission Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the neutral position sensor.
• Test the neutral position sensor for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the neutral position sensor if faulty.
• Reprogram or replace the TCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain transmission components.
• Ensure connectors and wiring are secure and free from corrosion.
• Follow the vehicle's maintenance schedule.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult a professional mechanic for accurate diagnosis and repair.
Check with the vehicle manufacturer for warranty coverage on transmission components.
This code has been associated with vehicles that have had transmission sensor issues, particularly in models with electronic gear selectors.
Moderate – It is advisable to address this issue soon to avoid transmission problems.
Driving with a faulty transmission sensor can lead to unsafe driving conditions. It is recommended to address this issue promptly.
• Vehicle parked on a level surface
• Transmission in neutral position
The neutral position sensor is typically located on the transmission or near the gear selector mechanism.
Q: Can I drive with a P086D code?
A: It's not recommended to drive with this code active, as it may lead to transmission issues.
Q: How do I reset the P086D code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, further diagnosis is needed.
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