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 is having trouble reading the sensor that checks how much tiny dirt is coming out of the car's exhaust. It's like trying to read a book with smudged glasses.
The P24AF code indicates an issue with the performance or range of the particulate matter sensor circuit. This sensor is responsible for monitoring the amount of particulate matter in the exhaust gases.
The particulate matter sensor is part of the vehicle's emission control system. It measures the concentration of soot particles in the exhaust gases. The P24AF code is triggered when the sensor's readings are outside the expected range, indicating a potential malfunction or issue with the sensor or its circuit.
• Check Engine Light is on
• Decreased fuel efficiency
• Possible increase in exhaust smoke
• Faulty particulate matter sensor
• Wiring issues in the sensor circuit
• Exhaust leaks affecting sensor readings
Particulate Matter: Tiny particles found in the air, such as soot, dust, and smoke.
Sensor Circuit: The electrical pathway that connects a sensor to the vehicle's computer.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors of the particulate matter sensor.
• Test the sensor's functionality using a multimeter.
• Replace the particulate matter sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Fix any exhaust leaks that may affect sensor readings.
• OBD-II scanner
• Multimeter
• Basic hand tools for sensor replacement
$150 - $400
Moderate
• Volkswagen Jetta
• Audi A3
• BMW 3 Series
• Regular maintenance checks of the exhaust system.
• Timely replacement of faulty sensors.
• Avoiding poor quality fuel that may increase soot production.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you notice increased exhaust smoke.
• Maintain regular service intervals for the emission control system.
Check with the vehicle manufacturer for warranty coverage on emission control components.
The P24AF code is relatively common in diesel vehicles due to the nature of their exhaust systems, which produce more particulate matter.
Moderate – While the vehicle may still be drivable, unresolved issues can lead to increased emissions and potential damage to the exhaust system.
Driving with a malfunctioning emission control system may violate local emissions laws and contribute to environmental pollution.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The particulate matter sensor is typically located in the exhaust system, near the diesel particulate filter.
Q: Can I drive with a P24AF code?
A: It's possible to drive with this code, but it's not recommended as it can lead to increased emissions and potential damage over time.
Q: How often should the particulate matter sensor be replaced?
A: The sensor should be checked regularly and replaced as needed, typically during routine maintenance if it shows signs of failure.
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A wired color-screen reader with readiness hotkeys, live data, code definitions, and data logging.
Good for emissions-related codes because it exposes readiness monitors and live powertrain data.
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Specialty · Smoke machine
Helpful for finding EVAP and vacuum leaks that are hard to see with visual inspection alone.
Helpful for tracking down EVAP and vacuum leaks that can trigger emissions faults.
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Specialty · O2 sensor socket
Helpful when the code points toward exhaust or oxygen-sensor work and space is tight.
Useful when the diagnosis points toward oxygen-sensor removal or replacement.
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