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 talking to the part that tells it what gear you're in. It's like when your remote control can't change the TV channel because the batteries are low.
The P07EF code indicates a problem with the electrical circuit that communicates the gear selection to the vehicle's computer.
The Transmission Range Sensor (TRS) sends signals to the Powertrain Control Module (PCM) or Transmission Control Module (TCM) to indicate the current gear selection. A 'Circuit Low' code suggests that the voltage in this circuit is lower than expected, which can be due to wiring issues, a faulty sensor, or a problem with the control module.
• Check Engine Light illuminated
• Transmission may not shift properly
• Vehicle may not start
• Faulty Transmission Range Sensor
• Damaged wiring or connectors
• Faulty Powertrain Control Module (PCM)
Transmission Range Sensor: A sensor that tells the vehicle's computer what gear the transmission is in.
PCM: Powertrain Control Module, the computer that controls engine and transmission functions.
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connectors for damage
• Test the Transmission Range Sensor for proper operation
• Replace the Transmission Range Sensor
• Repair or replace damaged wiring or connectors
• Reprogram or replace the PCM if necessary
• OBD-II scanner
• Multimeter
• Wiring repair tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance checks
• Inspect wiring for wear and tear
• Ensure proper installation of sensors
Sensor Issue
• Avoid driving the vehicle until repaired to prevent further damage
• Consult with a professional mechanic for accurate diagnosis
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code has been associated with issues in vehicles with automatic transmissions, particularly those with high mileage or poor maintenance history.
Moderate – Addressing this issue is important to ensure the vehicle operates correctly, but it may not require immediate attention unless symptoms are severe.
Driving with a malfunctioning transmission can lead to unsafe driving conditions. It is advisable to have the vehicle inspected and repaired by a qualified technician.
• Vehicle in park or neutral
• Engine running
The Transmission Range Sensor is typically located on the transmission housing, near the shift linkage.
Q: Can I drive with a P07EF code?
A: It's not recommended, as it can lead to transmission issues and unsafe driving conditions.
Q: How do I clear a P07EF code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is fixed to prevent it from returning.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.