Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's computer is having trouble understanding which gear your car is in because a sensor is sending a signal that's too strong.
The Transmission Range Sensor (TRS) is responsible for telling the car's computer which gear the transmission is in. Code P2803 indicates that the signal from this sensor is higher than expected.
The Transmission Range Sensor B Circuit High code means that the powertrain control module (PCM) has detected a voltage signal from the transmission range sensor that is above the specified range. This sensor helps the PCM determine the position of the gear selector and manage transmission functions accordingly.
• Check Engine Light is on
• Transmission may not shift properly
• Vehicle may not start
• Faulty transmission range sensor
• Wiring issues such as short circuits or open circuits
• Faulty PCM
Transmission Range Sensor: A sensor that tells the car's computer which gear the transmission is in.
PCM: Powertrain Control Module, the car's computer that controls engine and transmission functions.
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for damage.
• Test the transmission range sensor for proper operation.
• 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
$100 - $300
Moderate
• Ford F-150
• Toyota Camry
• Honda Accord
• Regular maintenance checks on the transmission system.
• Ensure wiring and connectors are kept clean and secure.
• Address any transmission issues promptly.
Sensor Issue
• Have the vehicle checked by a professional mechanic.
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
Check with the vehicle manufacturer for warranty coverage on transmission components.
This code has been associated with issues in vehicles with automatic transmissions, particularly in models with electronic gear selectors.
Moderate – It is advisable to address this issue soon to avoid potential transmission damage.
Driving with a faulty transmission sensor can lead to unsafe driving conditions. Address the issue promptly.
• Vehicle in park or neutral
• Engine running
The transmission range sensor is typically located on the transmission housing, near the gear selector mechanism.
Q: Can I drive with a P2803 code?
A: It's not recommended to drive with this code active as it can lead to transmission issues and unsafe driving conditions.
Q: How do I reset the P2803 code?
A: After repairs, you can reset the code using an OBD-II scanner. However, ensure the issue is fixed to prevent the code from returning.
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