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 has detected a problem with the sensor that measures the voltage of the air conditioner's compressor motor. It's saying the voltage is lower than it should be.
The P1D29 code is triggered when the voltage reading from the A/C compressor motor voltage sensor 'B' is detected to be lower than the expected range.
The A/C compressor motor voltage sensor 'B' is responsible for monitoring the voltage supplied to the A/C compressor motor. If the voltage is too low, it may indicate a problem with the sensor, wiring, or the compressor motor itself. This code is set when the sensor reports a voltage that is outside the acceptable range.
• A/C not working properly
• Check Engine Light is on
• Unusual noises from the A/C system
• Faulty A/C compressor motor voltage sensor
• Damaged wiring or connectors
• Faulty A/C compressor motor
A/C: Air Conditioning
OBD-II: On-Board Diagnostics, Second Generation
• Check for any other related codes and address them first.
• Inspect the wiring and connectors for damage or corrosion.
• Test the A/C compressor motor voltage sensor for proper operation.
• Replace the A/C compressor motor voltage sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the A/C compressor motor if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Honda Accord
• Toyota Camry
• Ford Fusion
• Regular maintenance checks of the A/C system.
• Ensure wiring and connectors are not exposed to moisture.
• Use the A/C system periodically to keep components in working order.
Sensor Issue
• Have the A/C system inspected by a professional if you notice any issues.
• Regularly check for any warning lights on the dashboard.
Check with your vehicle manufacturer for warranty coverage on A/C system components.
This code has been reported in vehicles with aging A/C systems or those that have experienced electrical issues.
Moderate – While the vehicle can still be driven, the A/C system may not function properly, which can be uncomfortable in hot weather.
Driving with a malfunctioning A/C system is not a safety hazard, but it can affect comfort and visibility if the defrost function is impaired.
• Vehicle must be running.
• A/C system should be turned on.
The A/C compressor motor voltage sensor is typically located near the A/C compressor in the engine bay.
Q: Can I drive my car with a P1D29 code?
A: Yes, but your A/C system may not work properly, affecting comfort.
Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes.
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