Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a tiny heater in a sensor that helps check the air coming out of your car's exhaust. The heater isn't working properly.
The P24B7 code indicates an issue with the resistance of the heater in the particulate matter sensor, which is crucial for accurate sensor readings.
The particulate matter sensor is equipped with a heater to ensure it operates correctly under various conditions. The resistance of this heater is monitored by the engine control module (ECM). If the resistance is outside the expected range, the ECM triggers the P24B7 code.
• Check Engine Light is on
• Possible increase in emissions
• Potential decrease in fuel efficiency
• Faulty particulate matter sensor heater
• Wiring issues such as a short or open circuit
• Faulty ECM
Particulate Matter: Tiny particles in the air that can include dust, dirt, soot, and smoke.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors of the particulate matter sensor.
• Test the resistance of the sensor heater with a multimeter.
• Replace the particulate matter sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Volkswagen Jetta
• Regularly inspect sensor wiring and connectors.
• Perform routine vehicle maintenance.
• Use high-quality fuel to prevent sensor clogging.
Sensor Issue
• Have your vehicle checked by a professional if the Check Engine Light is on.
• Avoid ignoring the issue as it can lead to increased emissions.
Check with your vehicle manufacturer as emissions-related components might be covered under warranty.
This code has become more common with the increased use of particulate matter sensors in modern vehicles to meet stricter emissions standards.
Moderate – It should be addressed soon to ensure emissions compliance and optimal vehicle performance.
Ignoring emissions-related issues can lead to failing emissions tests and potential fines.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The particulate matter sensor is typically located in the exhaust system, near the catalytic converter.
Q: Can I drive with a P24B7 code?
A: While the car may still be drivable, it's best to address the issue to avoid increased emissions and potential further damage.
Q: How does a particulate matter sensor work?
A: It measures the amount of soot or particulate matter in the exhaust gases to help control emissions.
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Universal · Digital multimeter
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
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Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
Catalyst-efficiency faults sometimes point toward converter problems after proper testing.
Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.