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's computer thinks the speed the car is going doesn't match what it should be based on other information it has. It's like when your friend says they're running fast, but you see them walking slowly.
The vehicle's computer system detects a discrepancy between the actual speed of the vehicle and the expected speed based on engine load and other parameters.
P152A is triggered when the Engine Control Module (ECM) detects that the vehicle speed is not plausible compared to the reference speed under load conditions. This could be due to faulty sensors or incorrect data being sent to the ECM.
• Inaccurate speedometer readings
• Check Engine Light is on
• Poor vehicle performance
• Faulty vehicle speed sensor
• Issues with the wheel speed sensors
• Problems with the transmission control module
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Check for any other related trouble codes.
• Inspect the vehicle speed sensor and wiring for damage.
• Test the wheel speed sensors for proper operation.
• Replace the vehicle speed sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the transmission control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain sensors.
• Ensure proper tire pressure and wheel alignment.
• Keep the vehicle's software updated.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you experience speed discrepancies.
• Regular maintenance can prevent such issues.
Check with your vehicle manufacturer for warranty coverage on sensors and related components.
This code has been more common in vehicles with electronic speed sensors and advanced transmission systems.
Moderate – It is important to address this issue to ensure accurate speed readings and vehicle performance.
Driving with inaccurate speed readings can lead to safety hazards and potential legal issues.
• Vehicle must be driven under various load conditions.
• Ensure all sensors are connected and operational during testing.
The vehicle speed sensor is typically located on the transmission or differential.
Q: Can I drive with a P152A code?
A: It's not recommended as it may affect the vehicle's performance and safety.
Q: How can I clear a P152A code?
A: After repairs, use an OBD-II scanner to clear the code from the ECM.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
View on Amazon
Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
View on Amazon
Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.