P2002 - DIESEL PARTICULATE FILTER EFFICIENCY BELOW THRESHOLD BANK 1

The Diesel Particulate Filter (DPF) located in the exhaust system is 98% effective in removing soot. It creates slight back pressure and its functionality is monitored by the PCM (Powertrain Control Module) through feedback sensors. These filters have regenerative capacity and allow burn the soot accumulation.

When the diagnostic code P2002 OBDII is stored, it is because of a problem that was found in the DPF filter. This is because the signal sent by the backpressure sensor to the PCM is not within the established parameters. The PCM understands this as a defect in the filter, so it will activate this code along with the Check Engine light.

• The light indicating a MIL is on.
• Fuel-saving decreases.
• Engine oil dilution.

The reasons why the fault code P2002 OBD2 is stored are the following:

• Low engine operating speeds for excessive time.
• The front of the DPF filter may leak air.
• Incorrect regeneration by PCM components in bad condition.
• The fuel provided may have a high percentage of sulfur which clogs the DPF
• The Diesel Particulate Filter may be defective.

The steps to solve the errors associated with the problem code P2002 OBDII are:

• Check the Diesel Particulate Filter and check for loose or badly fitted connections. Make the necessary corrections.
• Check the Differential Pressure Sensors located on the front and back of the Diesel Particulate Filter. Check that the cables of these sensors are in good condition and that the connectors are not corroded. Repair as necessary.
• Drive the vehicle at highway speeds within at least 30 minutes. With this, the regeneration process must be carried out. If not, it is necessary to change the Diesel Particulate Filter or reprogram the computer.