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 your car's computer has detected a problem with a sensor that tells it what gear the car is in. It's like when you press a button on a TV remote and nothing happens because the battery is low.
The P18E4 code is triggered when the transmission range sensor circuit 'B' sends a signal to the powertrain control module (PCM) that is below the expected voltage range.
The transmission range sensor is responsible for informing the PCM about the current gear selection. Circuit 'B' refers to a specific part of this sensor's circuitry. A 'low' signal indicates that the voltage is below the threshold needed for proper operation, which could be due to a wiring issue, sensor failure, or other electrical problems.
• Check Engine Light is on
• Transmission may not shift properly
• Vehicle may not start or may start in the wrong gear
• Faulty transmission range sensor
• Wiring issues or poor connection in the sensor circuit
• Failed PCM
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to verify the code
• Inspect the transmission range sensor and its wiring for damage
• Test the sensor's voltage and continuity
• Replace the faulty transmission range sensor
• Repair or replace damaged wiring or connectors
• Reprogram or replace the PCM if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly inspect and maintain transmission components
• Ensure electrical connections are clean and secure
• Avoid harsh driving conditions that may damage the transmission
Sensor Issue
• Have the vehicle inspected by a professional as soon as possible
• Avoid driving the vehicle if it shows signs of transmission issues
Check with your vehicle manufacturer for warranty coverage on powertrain components.
This code has been commonly reported in vehicles with automatic transmissions, often due to sensor wear or electrical issues.
Moderate – While the vehicle may still be drivable, improper gear indication can lead to unsafe driving conditions.
Driving with a malfunctioning transmission sensor can lead to unexpected vehicle behavior and increase the risk of accidents.
• Vehicle in Park or Neutral
• Engine running
The transmission range sensor is typically located on the transmission housing near the gear selector shaft.
Q: Can I drive with a P18E4 code?
A: It's not recommended to drive with this code as it can lead to unsafe driving conditions.
Q: How can I reset the P18E4 code?
A: You can reset the code using an OBD-II scanner, but it's important to fix the underlying issue first.
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