ECD SYSTEM (for DPF), Diagnostic DTC:P2002
| DTC Code | DTC Name |
|---|---|
| P2002 | Particulate Trap Efficiency Below Threshold (Bank1) |
DESCRIPTION
Tech Tips
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For more information on the Diesel Particulate Filter (DPF) catalytic converter, refer to the following procedures Click here.
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If P2002 is present, refer to the DTC table for Diesel Particulate Filter System Click here.
Tech Tips
The DPF catalyst has an ability to reduce particulate matter (PM), hydrocarbons (HC) and carbon monoxides (CO). The DPF catalyst is a monolithic type catalyst. Alternating passages in the catalyst have either their inlet or outlet blocked. This forces the exhaust gasses to flow through the walls of the passages (see illustration above). Due to the flow of the exhaust gasses through micro-cavities in the passage walls, it is called a "wall flow" type converter.
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
|---|---|---|
| - | The Catalyst Record exceeds the threshold (Thermal deterioration malfunction) (1 trip detection logic). |
DPF catalytic converter (Exhaust manifold converter sub-assembly) |
| DTC No. | Data List |
|---|---|
| P2002 | DPF Thermal Deteriorate |
MONITOR DESCRIPTION
In order to detect abnormality in the DPF catalytic converter, the ECM monitors the exhaust gas temperature as well as differential pressure in front of and behind the DPF catalyst.
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Furthermore, the ECM calculates and integrates the Catalyst Record of catalyst thermal deterioration data with the catalyst temperature. If Catalyst Record exceeds the threshold, the ECM interprets this as a malfunction in the DPF catalyst and illuminates the MIL.
Thermal deterioration malfunction
INSPECTION PROCEDURE
Note
After replacing the DPF catalyst, clear the thermal deterioration data stored in the ECM.
Tech Tips
Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
PROCEDURE
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REPLACE CATALYTIC CONVERTER
Tech Tips
When the DPF catalytic converter (Exhaust manifold converter sub-assembly) is replaced, the catalyst record of DPF thermal deterioration stored in the ECM must be cleared.
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Replace the DPF catalytic converter (Exhaust manifold converter sub-assembly) Click here.
NEXT 
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CATALYST RECORD CLEAR
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Connect the intelligent tester to the DLC3.
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Turn the ignition switch to ON and turn the tester on.
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Enter the menu options in this order: Powertrain / Engine and ECT / Utility / Catalyst Record Clear.
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