| Mazda P2002 | Diesel particulate trap efficiency below threshold |
|---|---|
|
DETECTION CONDITION
|
• The PCM monitors the exhaust pressure before and after the diesel particulate filter, using the diesel particulate filter differential pressure sensor. If the pressure difference is below calibrated value, the PCM determines that the diesel particulate filter trap efficiency is below threshold.
|
|
POSSIBLE CAUSE
|
• Particulate filter differential pressure sensor malfunction
• Loose or poor installation particular filter differential pressure sensor pipe
• Exhaust gas leakage in exhaust system
• Diesel particulate filter restriction and/or damaged
• Scheduled maintenance does not have followed
• No fuel additive in fuel additive tank
• PCM malfunction
|
Diagnostic procedure
| STEP | INSPECTION | ACTION | |
|---|---|---|---|
|
1
|
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA been recorded?
|
Yes
|
Go to the next step.
|
|
No
|
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
|
||
|
2
|
VERIFY REPAIR INFORMATION AVAILABILITY
• Verify related service repair information availability.
• Is any related repair information available?
|
Yes
|
Perform repair or diagnosis according to the available repair information.
If the vehicle is not repaired, go to the next step.
|
|
No
|
Go to the next step.
|
||
|
3
|
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is P2002 on FREEZE FRAME DATA?
|
Yes
|
Go to the applicable DTC inspection.
|
|
No
|
Go to the next step.
|
||
|
4
|
CHECK PCL LAMP STATE
• Start the engine.
• Check the PCL lamp state.
• Does the PCL lamp illuminate?
|
Yes
|
Refill the fuel additive, then go to Step 9.
|
|
No
|
Go to the next step.
|
||
|
5
|
VERIFY VEHICLE SCHEDULED MAINTENANCE
• Verify vehicle has followed scheduled maintenance items below:
• Does the vehicle have followed these items?
|
Yes
|
Go to the next step.
|
|
No
|
Followed the scheduled maintenance, then go to Step 9.
|
||
|
6
|
INSPECT EXHAUST GAS LEAKAGE
• Inspect the exhaust system for leakage.
• Is there any leakage found around diesel particulate filter and exhaust manifold?
|
Yes
|
Repair or replace malfunctioning part, then go to Step 9.
|
|
No
|
Go to the next step.
|
||
|
7
|
INSPECT EXHAUST DIFFERENTIAL PRESSURE SENSOR PIPING
• Inspect for connection and condition at exhaust differential pressure sensor side piping.
• Is there any clacked and/or damaged found?
|
Yes
|
Repair or replace for malfunctioning part, then go to Step 9.
|
|
No
|
Go to the next step.
|
||
|
8
|
INSPECT EXHAUST DIFFERENTIAL PRESSURE SENSOR
• Inspect the exhaust differential pressure sensor.
• Is the differential pressure sensor normal?
|
Yes
|
Intermittent concern exists, go to the next step.
|
|
No
|
Replace the exhaust differential pressure sensor, then go to Step 9.
|
||
|
9
|
INSPECT FOR RESTRICTION OR CLOGGED IN DIESEL PARTICULATE FILTER
• Access DPF_DIF PID using the M-MDS.
• Start the engine.
• Monitor DPF_DIF PID.
• Is the DPF_DIF PID value below specified?
|
Yes
|
Go to the next step.
|
|
No
|
Replace diesel particulate filter, then go the next step.
|
||
|
10
|
VERIFY THAT DTC P2002 TROUBLESHOOTING IS COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Start the engine and warm-up to normal operating temperature.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Retrieve the DTC using the M-MDS.
• Is the PENDING CODE same DTC present?
|
Yes
|
Replace PCM, then go to the next step.
|
|
No
|
Go to the next step.
|
||
|
11
|
VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure”.
• Is there any DTC present?
|
Yes
|
Go to the applicable DTC inspection.
|
|
No
|
Troubleshooting completed.
|
||