Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is confused because the speed it's reading doesn't make sense.
This code indicates that the vehicle's speed sensor is reporting a speed that doesn't match the expected values based on other data.
The P1505 code is triggered when the Engine Control Module (ECM) receives a signal from the vehicle speed sensor that is not plausible when compared with other inputs such as engine RPM and gear position. This discrepancy may indicate a fault in the sensor, wiring, or related components.
• Inaccurate speedometer readings
• Check engine light illuminated
• Erratic transmission shifting
• Faulty vehicle speed sensor
• Damaged wiring or connections
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the vehicle speed sensor and wiring for damage.
• Test the sensor output with a multimeter.
• Replace the faulty vehicle speed sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford Focus
• Honda Accord
• Toyota Camry
• Regular maintenance checks
• Ensure wiring is intact and protected
• Avoid harsh driving conditions
Sensor Issue
• Drive cautiously until the issue is resolved.
• Avoid relying on the speedometer for accurate speed readings.
Check if your vehicle's powertrain warranty covers sensor replacements.
This code has been common in vehicles with aging speed sensors or those exposed to harsh environments.
Moderate – It affects drivability but is not an immediate safety concern.
Driving with an inaccurate speedometer may lead to speeding violations.
• Vehicle in motion
• Engine running
The vehicle speed sensor is typically located on the transmission.
Q: Can I drive with a P1505 code?
A: Yes, but it may affect speedometer accuracy and transmission performance.
Q: Will a P1505 code cause my car to fail emissions testing?
A: Not directly, but it may cause issues if related codes are present.
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