Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means the car is going too fast, faster than it's supposed to. It's like when you run too fast and your parents tell you to slow down so you don't trip and fall.
The P0297 code is triggered when the vehicle's speed exceeds a predetermined limit set by the manufacturer.
The P0297 code indicates that the vehicle has exceeded the maximum speed limit programmed into the Engine Control Module (ECM). This is a safety feature to prevent damage to the vehicle or unsafe driving conditions. The ECM monitors the vehicle speed through sensors and will set this code if it detects speeds above the threshold.
• Check Engine Light is on
• Vehicle speed is limited
• Potential loss of power
• Faulty speed sensor
• Malfunctioning ECM
• Incorrect tire size affecting speed readings
ECM: Engine Control Module, the computer that controls engine functions.
OBD-II: On-Board Diagnostics II, a standardized system for vehicle self-diagnostics.
• Check for any other related codes.
• Inspect the speed sensor and its wiring for damage.
• Verify the tire size and ensure it matches the manufacturer's specifications.
• Replace or repair the speed sensor.
• Reprogram or replace the ECM if necessary.
• Adjust tire size to match specifications.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $500
Moderate
• Ford F-150
• Toyota Camry
• Chevrolet Silverado
• Regularly check speed sensor function.
• Ensure correct tire size is used.
• Avoid driving at excessive speeds.
Engine Performance
• Avoid driving at high speeds to prevent triggering the code.
• Regularly maintain the vehicle's speed sensors.
Check with the vehicle manufacturer for specific warranty coverage related to the ECM and speed sensors.
The P0297 code has been used since the introduction of OBD-II systems to monitor and control vehicle speed for safety reasons.
Moderate – It is important to address this code to ensure safe driving conditions and prevent potential vehicle damage.
Driving at excessive speeds can be dangerous and is often illegal. Ensure your vehicle is operating within safe speed limits.
• Vehicle must be driven at various speeds.
• Ensure the vehicle is on a level surface.
The speed sensor is typically located on the transmission or wheel hub assembly.
Q: Can I drive with a P0297 code?
A: It's not recommended to drive with this code active as it indicates the vehicle is exceeding safe speed limits.
Q: Will a P0297 code affect fuel efficiency?
A: Yes, driving at high speeds can reduce fuel efficiency and may cause additional wear on the vehicle.
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.