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 noticed a problem with two sensors that measure pressure in the exhaust system. These sensors aren't agreeing with each other, which could mean something is wrong.
The car's onboard computer is detecting a discrepancy between the readings of two pressure sensors located around the particulate filter in the exhaust system.
The P246D code is triggered when the Engine Control Module (ECM) detects that the readings from the Particulate Filter Pressure Sensor A and Sensor B do not correlate as expected. This could indicate a fault in one or both sensors, or an issue with the particulate filter itself.
• Check Engine Light is on
• Decreased engine performance
• Increased fuel consumption
• Faulty particulate filter pressure sensor
• Exhaust leak near the particulate filter
• Clogged or damaged particulate filter
Particulate Filter: A device in the exhaust system that captures soot and other particles from the engine.
Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for the pressure sensors.
• Check for exhaust leaks near the particulate filter.
• Replace the faulty pressure sensor.
• Repair any exhaust leaks.
• Clean or replace the particulate filter if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $600
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly inspect and maintain the exhaust system.
• Use high-quality fuel to reduce particulate buildup.
• Ensure timely servicing of the particulate filter.
Sensor Issue
• Avoid driving the vehicle until the issue is diagnosed.
• Consult a professional mechanic for accurate diagnosis.
• Regular maintenance can prevent such issues.
Check if your vehicle's emission system is still under warranty, as this repair might be covered.
This code has become more common with the increased use of diesel particulate filters in modern vehicles.
Moderate – While the vehicle may still be drivable, prolonged use can lead to more severe issues.
Driving with a malfunctioning exhaust system can increase emissions and may not comply with local regulations.
• Engine running and warmed up
• Vehicle stationary
The particulate filter pressure sensors are located in the exhaust system, near the diesel particulate filter.
Q: Can I drive with a P246D code?
A: It's not recommended to drive for extended periods with this code, as it can lead to further damage.
Q: How can I prevent this code from appearing?
A: Regular maintenance and using high-quality fuel can help prevent issues with the particulate filter and sensors.
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