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 is having trouble reading a sensor that tells it what gear the car is in. It's like when a video game controller doesn't work right and the game can't tell if you pressed a button.
The Transmission Range Sensor (TRS) is responsible for sending information about the gear position to the vehicle's computer. An intermittent issue means the signal from the sensor is not consistent.
The P2804 code indicates that the Powertrain Control Module (PCM) has detected an intermittent signal from the Transmission Range Sensor B. This sensor is part of the vehicle's transmission system and helps the PCM determine the correct gear position. An intermittent circuit can cause erratic shifting and other transmission-related issues.
• Erratic or harsh shifting
• Transmission stuck in one gear
• Check Engine Light illuminated
• Faulty Transmission Range Sensor
• Damaged or corroded wiring/connectors
• Faulty PCM
PCM: Powertrain Control Module, the computer that controls the engine and transmission.
TRS: Transmission Range Sensor, a sensor that tells the PCM the current gear position.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the Transmission Range Sensor for proper operation.
• Replace the Transmission Range Sensor if faulty.
• Repair or replace damaged wiring/connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II Scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Honda Accord
• Toyota Camry
• Regularly inspect and maintain transmission components.
• Ensure wiring and connectors are free from corrosion.
• Avoid harsh driving conditions that may stress the transmission.
Sensor Issue
• Do not ignore the Check Engine Light; address the issue promptly.
• Avoid driving with erratic shifting to prevent further damage.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for warranty coverage on transmission components.
This code has been commonly associated with vehicles experiencing transmission issues due to sensor failures or wiring problems.
Moderate – Addressing this issue promptly can prevent further transmission damage.
Driving with a faulty transmission sensor can lead to unsafe driving conditions. It is recommended to repair the issue as soon as possible.
• Vehicle must be running.
• Transmission should be engaged in different gears to test sensor response.
The Transmission Range Sensor is typically located on the side of the transmission housing.
Q: Can I drive my car with a P2804 code?
A: It's not recommended to drive with this code, as it can lead to unsafe driving conditions and further damage to the transmission.
Q: How do I reset the Check Engine Light after fixing the issue?
A: You can use an OBD-II scanner to clear the code after repairs are completed, or disconnect the battery for a few minutes.
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