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 car's computer has detected a problem with the power going to a sensor that helps the car know what gear it's in. It's like when a toy doesn't work because the batteries are too strong or too weak.
The Transmission Range Sensor (TRS) is responsible for sending signals to the vehicle's computer about the current gear position. A 'Circuit High' condition indicates that the voltage in the power supply circuit is higher than expected.
The P18E6 code is triggered when the Engine Control Module (ECM) or Transmission Control Module (TCM) detects a voltage level in the Transmission Range Sensor power supply circuit that is above the specified threshold. This could indicate a problem with the sensor itself, the wiring, or the power supply.
• Check Engine Light illuminated
• Transmission stuck in one gear
• Erratic shifting
• Faulty Transmission Range Sensor
• Wiring issues such as shorts or open circuits
• Defective ECM or TCM
Transmission Range Sensor: A sensor that detects the gear position of the transmission.
ECM: Engine Control Module, the computer that controls engine operations.
TCM: Transmission Control Module, the computer that controls transmission operations.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors related to the Transmission Range Sensor.
• Test the voltage and ground at the sensor.
• Repair or replace damaged wiring or connectors.
• Replace the Transmission Range Sensor if faulty.
• Reprogram or replace the ECM/TCM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Ford F-150
• Regularly inspect and maintain transmission wiring.
• Avoid driving through deep water that could damage electrical components.
• Ensure regular vehicle maintenance checks.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you experience shifting issues.
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code has been associated with vehicles experiencing electrical issues in the transmission system, often due to environmental factors affecting wiring.
Moderate – Addressing this issue promptly can prevent further transmission damage.
Driving with transmission issues can lead to unsafe driving conditions. It is recommended to have the vehicle inspected and repaired as soon as possible.
• Vehicle must be in a safe, stationary position.
• Ensure the battery is fully charged before testing.
The Transmission Range Sensor is typically located on the transmission housing, near the gear selector lever.
Q: Can I drive my car with a P18E6 code?
A: It's not recommended to drive with this code as it may cause transmission problems.
Q: How do I clear the P18E6 code?
A: After repairs, use an OBD-II scanner to clear the code. If the problem persists, further diagnosis is needed.
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