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 something is wrong with the electrical parts that help control the car's transmission, which is the part that changes gears.
P0702 is triggered when the transmission control system detects an electrical issue within its circuits.
The P0702 code indicates that the Transmission Control Module (TCM) has detected a malfunction in the transmission's electrical control system. This could involve wiring, connectors, or the TCM itself. The TCM monitors various sensors and actuators to ensure proper operation of the transmission. If it detects an abnormal voltage or resistance, it triggers this code.
• Check Engine Light is on
• Transmission may not shift properly
• Poor fuel economy
• Faulty Transmission Control Module (TCM)
• Damaged wiring or connectors
• Short or open circuit in the transmission control system
Transmission Control Module (TCM): A component that controls the operation of the transmission.
OBD-II: On-Board Diagnostics, a system for self-diagnosing and reporting vehicle issues.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the TCM for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the Transmission Control Module if faulty.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Wire repair tools
$150 to $1200 depending on the cause and vehicle model
Moderate
• Honda Accord
• Ford F-150
• Toyota Camry
• Regularly inspect and maintain transmission wiring.
• Avoid harsh driving conditions that could damage electrical components.
• Ensure transmission fluid is at the correct level and condition.
Electrical Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Avoid driving the vehicle if transmission issues are severe.
Transmission control system components may be covered under the powertrain warranty.
P0702 has been a common code for vehicles with aging electrical systems, often seen in vehicles over 100,000 miles.
Moderate – Addressing the issue promptly can prevent further transmission damage.
Driving with a malfunctioning transmission can be unsafe and may lead to further vehicle damage.
• Vehicle at operating temperature
• Transmission in gear
The Transmission Control Module is typically located near the transmission or engine bay.
Q: Can I drive my car with a P0702 code?
A: It's not recommended to drive for long distances as it might lead to further damage.
Q: How can I prevent a P0702 code?
A: Regular maintenance and inspection of the transmission system can help prevent this code.
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