susan_braun9
Civic Diesel Exhaust Pressure Issue
Summary of the thread
A 2012 Honda Civic diesel is experiencing a warning light, reduced power, smoke from the exhaust, and a strong odor, with diagnostics indicating excessively low diesel particulate filter (DPF) exhaust pressure. These symptoms suggest a possible defect in the exhaust back pressure sensor, which is crucial for proper DPF regeneration. It is recommended to have a professional mechanic inspect and potentially replace the sensor to prevent further damage.
Did this summary help you solve your problem?
4 comment(s)
susan_braun9 (community.author)
I'm not experienced with automotive repairs, so I haven't inspected the sensor. Could you elaborate on the location of the exhaust back pressure sensor, and would a visual inspection be enough to confirm it's failing?
susanraven21
Without proper tools and expertise, a visual inspection won't tell you much beyond obvious physical damage. The sensor is usually located near the diesel particulate filter (DPF) in the exhaust system, but its exact position can vary. Since you're experiencing multiple symptoms, and the diagnostic points to a sensor issue, I'd recommend taking it to a trusted workshop. They can properly diagnose the sensor and replace it if necessary. Continuing to drive with a faulty DPF system can cause further damage.
susan_braun9 (community.author)
I will schedule an appointment with my local mechanic to have the exhaust back pressure sensor inspected and replaced. The estimated repair cost is 245€. Thanks for the help.
rmh_community_comment_box_header
community_crosslink_scanner_headline
community_crosslink_scanner_intro
community_crosslink_scanner_title
community_crosslink_scanner_price
community_crosslink_rmh_headline
community_crosslink_rmh_intro
community_crosslink_rmh_title
community_crosslink_rmh_subtitle
community_crosslink_rmh_brand
HONDA
community_crosslink_rmh_model
CIVIC
susanraven21
I also drive a Civic diesel and had similar symptoms, including the warning light and reduced power. If the diagnostic says the pressure is low, it's quite possible that the exhaust back pressure sensor is faulty. This sensor measures the pressure in the exhaust system, which is needed for proper DPF regeneration. DPF regeneration is a process where the accumulated soot in the particulate filter is burned off. If the sensor is defective, the engine control unit (ECU) receives incorrect data and can't initiate or control the DPF regeneration, and thus the car will show these symptoms. Have you checked the sensor for any visible damage or loose connections?