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 system tried to clean a filter that catches dirty particles from the engine, but it didn't finish the job on one side of the engine.
The vehicle's computer system detected that the regeneration process of the diesel particulate filter (DPF) on Bank 2 was not completed successfully.
The Diesel Particulate Filter (DPF) is designed to capture and store exhaust soot in order to reduce emissions from diesel engines. The regeneration process is a cleaning cycle that burns off the accumulated soot. Code P243E indicates that this process was not completed on Bank 2, which may lead to increased emissions and reduced engine performance.
• Check Engine Light is on
• Decreased fuel efficiency
• Reduced engine performance
• Faulty DPF sensor
• Exhaust leaks
• Engine running too cold
DPF: Diesel Particulate Filter
Regeneration: The process of burning off soot collected in the DPF
• Use an OBD-II scanner to confirm the code.
• Inspect the DPF and related sensors for damage or clogs.
• Check for exhaust leaks or other issues that could prevent proper regeneration.
• Replace or clean the DPF sensor if faulty.
• Repair any exhaust leaks.
• Ensure the engine reaches proper operating temperature.
• OBD-II scanner
• Wrench set
• Multimeter
$200 - $1000
Moderate
• Ford F-250
• Chevrolet Silverado
• Dodge Ram 2500
• Regularly maintain the exhaust system.
• Ensure timely oil changes.
• Use high-quality diesel fuel.
Engine Performance
• Avoid short trips that prevent the engine from reaching operating temperature.
• Regularly drive the vehicle on highways to allow for proper DPF regeneration.
Check with the vehicle manufacturer for specific warranty coverage on emission-related components.
This code has become more common with the increased use of DPF systems in diesel vehicles to meet emission standards.
Moderate – Addressing this issue promptly can prevent further damage to the DPF and maintain engine performance.
Ignoring this code can lead to increased emissions, which may violate local environmental regulations.
• Vehicle at operating temperature
• Highway driving conditions
The DPF is located in the exhaust system, typically under the vehicle near the engine.
Q: Can I drive with a P243E code?
A: It's possible to drive for a short period, but it's best to address the issue soon to avoid further damage.
Q: How often should the DPF regenerate?
A: The DPF typically regenerates every 300-500 miles, depending on driving conditions.
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