dino_78
Utente
- Registrato
- 27 Feb 2016
- Messaggi
- 182
- Punteggio reazioni
- 75
- Provincia
- ESTERO
- Auto ed Allestimento
- Tucson 4wd 136cv M/T Micron grey
Il codice associate ad un malfunzionamento DPF dovrebbe essere P2002 oppure P2003.......forse a qualcuno protrebbe interessare queste info...
Symptoms of a P2002 DTC may include:
The causes for this DTC may include:
The solutions are somewhat limited since the DPF is not defective, only temporarily clogged with particulates from soot. If the light is on and the code P2002 is set, use the process of elimination starting with a visual inspection.
Inspect the DPF on Bank #1 for loose connections on the engine side where it mounts to the exhaust.
Inspect the differential pressure sensors located on the front and rear of the DPF (bank 1). Look for burnt wires or loose or corroded connectors. Pull the connectors apart and look for bent or corroded pins. Make sure the sensor wires are not resting on the DPF. Start the truck and look for leaks on or around the unit.
If everything is good in the above steps, then drive the truck for approximately 30 minutes at highway speeds in order to raise the exhaust temperature enough to regenerate the DPF. Personally, I have found that idling the engine at 1400 rpm for approximately 20 minutes has the same results.
If the problem still persists after driving at highway speeds, the best thing to do is take it to a shop and have them place it on a diagnostic computer such as the Tech II. This is not expensive and they can watch the sensors and the ECU in real time operation. They can see the signals from the sensors and if the ECU is in fact attempting the regenerating process. The bad part is quickly identified.
If you do mostly in-town driving and this is a recurring problem, there is another solution. Most shops can reprogram your computer to prevent the regenerating process in a few moments. Next, remove the PDF and replace it with a straight pipe (if legal in your jurisdiction). Problem solved. Don't discard the DPF however, it is worth a lot of money should you sell it or need it in the future.
Symptoms of a P2002 DTC may include:
- A drop in fuel economy occurs as the engine management system attempts to increase the temperature of the exhaust to burn off the excess soot in the DPF
- The check engine light will be on with the code "P2002." The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
- The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
- If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
The causes for this DTC may include:
- Too much slow speed operation will cause this code. It takes heat in the 500c to 600c range to burn off the soot in the DPF. Even with the ECUs efforts in engine management, it has difficulty in creating enough heat to clear the DPF at slow engine speeds
- An air leak forward of the DPF will change the sensor readings resulting in the code
- Defective ECU strategies or components will prevent proper regeneration
- Fuel with a large percentage of sulfur will clog the DPF quickly
- Some aftermarket accessories and performance modifications
- Dirty air cleaner element
- Damaged DPF
The solutions are somewhat limited since the DPF is not defective, only temporarily clogged with particulates from soot. If the light is on and the code P2002 is set, use the process of elimination starting with a visual inspection.
Inspect the DPF on Bank #1 for loose connections on the engine side where it mounts to the exhaust.
Inspect the differential pressure sensors located on the front and rear of the DPF (bank 1). Look for burnt wires or loose or corroded connectors. Pull the connectors apart and look for bent or corroded pins. Make sure the sensor wires are not resting on the DPF. Start the truck and look for leaks on or around the unit.
If everything is good in the above steps, then drive the truck for approximately 30 minutes at highway speeds in order to raise the exhaust temperature enough to regenerate the DPF. Personally, I have found that idling the engine at 1400 rpm for approximately 20 minutes has the same results.
If the problem still persists after driving at highway speeds, the best thing to do is take it to a shop and have them place it on a diagnostic computer such as the Tech II. This is not expensive and they can watch the sensors and the ECU in real time operation. They can see the signals from the sensors and if the ECU is in fact attempting the regenerating process. The bad part is quickly identified.
If you do mostly in-town driving and this is a recurring problem, there is another solution. Most shops can reprogram your computer to prevent the regenerating process in a few moments. Next, remove the PDF and replace it with a straight pipe (if legal in your jurisdiction). Problem solved. Don't discard the DPF however, it is worth a lot of money should you sell it or need it in the future.
