1. DTC P2002 description
The exhaust differential pressure sensor is installed to the cylinder head cover bracket near the DPD. The exhaust differential pressure sensor changes the signal voltage in accordance with changes in the exhaust gas pressure difference between the front and rear of the DPD filter. If the ECM detects that the exhaust differential pressure is lower by a predetermined amount when compared with the calculated exhaust gas flow amount, the DTC is set.
2. Condition for setting DTC P2002
Condition for running the DTC
- The battery voltage is 9 to 16 V.
- The ignition switch is ON.
- The engine runtime is 3 seconds or more.
- DPD regeneration is stopped.
- The intake throttle valve opening position is 20% or more.
- The distance traveled since the last DPD regeneration is 15 to 4,000 km.
- Exhaust Gas Temperature 1 is 250°C {482°F} or more.
- The fuel injection quantity is 45 mm3/st or more and does not change by 250 mm3/st or more.
- The engine speed is 1,550 rpm or more.
- The engine coolant temperature is 75 to 150°C {167 to 302°F}.
- The barometric pressure is 56 kPa {8 psi} or more.
- The turbocharger is normal.
- The intake air temperature is -40 to 100°C {-40 to 212°F}.
- DTCs P0102, P0103, P0112, P0113, P0116, P0117, P0118, P0122, P0123, P0403, P0427, P0428, P060B, P0697, P2227, P2228, P2229, P2453, P2454, P2455, U0074, and U010A are not set.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0102 Mass Air Flow Circuit Low Input".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0103 Mass Air Flow Circuit High Input".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0112 Intake Air Temperature Sensor Circuit Low".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0113 Intake Air Temperature Sensor Circuit High".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0116 Engine Coolant Temperature Sensor Circuit Range/Performance".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0117 Engine Coolant Temperature Sensor Circuit Low".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0118 Engine Coolant Temperature Sensor Circuit High".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0122 Throttle Position Sensor Circuit Low".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0123 Throttle Position Sensor Circuit High".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0403 Exhaust Gas Recirculation (EGR) Motor Control Circuit".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0427 Exhaust Gas Temperature (EGT) Sensor 1 Circuit Low".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0428 Exhaust Gas Temperature (EGT) Sensor 1 Circuit High".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P060B Internal Control Module A/D Processing Performance".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0697 Sensor Reference Voltage 3 Circuit".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P2227 Barometric Pressure Circuit Range/Performance".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P2228 Barometric Pressure Circuit Low".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P2229 Barometric Pressure Circuit High".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P2453 Differential Pressure Sensor Circuit Range/Performance".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P2454 Differential Pressure Sensor Circuit Low".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P2455 Differential Pressure Sensor Circuit High".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC U0074 Control Module Communication Bus Off - Local CAN".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC U010A Lost Communication With Exhaust Gas Recirculation (EGR) Control Module".
Condition for setting the DTC
- The ECM detects that the exhaust differential pressure is less than the predetermined range for the calculated differential pressure for 11 seconds or more.
3. Action taken when DTC P2002 sets
- The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type A.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".
- The ECM limits the fuel injection quantity.
- The ECM inhibits the EGR control.
- The ECM inhibits the DPD regeneration.
- The ECM inhibits the cruise control.
4. Condition for clearing DTC P2002
- Refer to Conditions for clearing the MIL/DTC - Type A or Type B.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".