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 is having trouble pushing exhaust through a special filter that cleans it. It's like when a vacuum cleaner's filter is clogged and it can't suck up dirt properly.
The P14B7 code indicates that the exhaust flow resistance in the particle filter on Bank 2 is higher than expected, which can affect the filter's ability to function properly.
The Diesel Particulate Filter (DPF) is designed to remove soot from the exhaust gases of a diesel engine. The P14B7 code is triggered when the Engine Control Module (ECM) detects that the flow resistance in the DPF on Bank 2 is above the threshold, indicating a potential blockage or restriction.
• Reduced engine performance
• Increased fuel consumption
• Check engine light illuminated
• Clogged diesel particulate filter (DPF)
• Faulty pressure sensor
• Exhaust leaks
DPF: Diesel Particulate Filter
ECM: Engine Control Module
• Check for other related codes
• Inspect the DPF for blockages
• Test the pressure sensor for proper operation
• Clean or replace the DPF
• Repair any exhaust leaks
• Replace the faulty pressure sensor
• OBD-II scanner
• Pressure gauge
• Basic hand tools
$500 - $2000
Moderate
• BMW 3 Series
• Mercedes-Benz C-Class
• Audi A6
• Regularly drive at highway speeds to allow the DPF to regenerate
• Use high-quality diesel fuel
• Perform regular maintenance checks
Exhaust System Issue
• Avoid short trips that don't allow the engine to warm up fully
• Consider professional cleaning services for the DPF
Check with your vehicle manufacturer for warranty coverage on exhaust components.
This code has become more common with the increased use of DPF systems in diesel vehicles to comply with emission standards.
Moderate – Addressing this issue promptly can prevent further engine performance issues.
Driving with a clogged DPF can lead to higher emissions, which may not comply with local environmental regulations.
• Engine at operating temperature
• Vehicle driven at highway speeds
The DPF is located in the exhaust system, typically near the engine or under the vehicle.
Q: Can I drive with a P14B7 code?
A: It's not recommended to drive for an extended period with this code, as it may lead to reduced engine performance and higher emissions.
Q: How often should the DPF be cleaned?
A: The DPF should be cleaned or regenerated as needed, typically every 100,000 miles, but this can vary based on driving conditions.
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