Q: Exhaust filter filling up

asked by on

I am having trouble with my diesel truck which has 195,000 miles on it. I've had to change out the exhaust filter at least two times recently and it is filling up again.

Hello, the engine computer is supposed to put the system through a regeneration process to burn off the soot and ash that builds up inside the filter. This truck is equipped with a DEF (diesel exhaust fluid) system, which sprays a urea solution into the exhaust to help burn off the ash and soot in the exhaust. The DEF system might not be injecting enough fluid for it to perform a regeneration cycle and burn off the soot. The vehicle should be checked for codes. Even though there is no Check Engine Light, there might be codes indicating a fault. If you would like help with this, a certified technician from YourMechanic can come to your home or office to have this issue inspected.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Exhaust filter filling up

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Service Problem. Today I brought in my 2015 Dodge Ram Diesel. (For Recall work) T25/NHTSA 17V-30

Hi Steven. It's very difficult to prove when electrical glitches occur or who should be "on the hook" for repair or diagnostic checks. The best advice I can offer is for you to speak with the service manager of the...

Q: Engine only runs at 650 or 1300 rpm's, and nothing in between 650 and 1300 or above 1300 rpm's.

Hi there. First check the air filter on the engine. A dirty air filter will starve a diesel engine and prevent it from running correctly. Then check the fuel / water separator and see if there is a drain valve....

Q: Car won't accelerate past 25 mph and makes deep noise when you try too replaced o2 sensor maf sensor/ throttle body does rattle

Hi there. It is quite possible that your car has entered what we call a fail safe or "limp mode" due to an error code being activated and stored in the ECU. This will occur when the ECU or a...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...