DTC P2096:00 [MZR 2.3 DISI Turbo]
id0102g4900400
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DTC P2096:00 |
Target A/F feedback system too lean |
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DETECTION CONDITION
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• The PCM monitors the target A/F fuel trim while under the target A/F feedback control. If the fuel trim is more than the specification, the PCM determines that the target A/F feedback system is too lean.
Diagnostic support note
• This is a continuous monitor (fuel system).
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
• The DTC is stored in the PCM memory.
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POSSIBLE CAUSE
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• Exhaust gas leakage
• HO2S malfunction
• IAT sensor malfunction
• Erratic signal to PCM
• A/F sensor malfunction
• Air suction in intake-air system
• MAF sensor malfunction
• Improper operation of ignition system
• Spark plug malfunction
• Ignition coil malfunction
• Insufficient engine compression
• High-pressure side fuel delivery system malfunction
• Low-pressure side fuel delivery system malfunction
• Improper operation of fuel injector
• ECT sensor malfunction
• PCM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2)
• Perform the Freeze Frame PID Data Access Procedure.
• Is the DTC P2096:00 on FREEZE FRAME DATA (Mode 2)?
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Yes
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Go to the next step.
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No
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Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA (Mode 2).
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2
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VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED
• Have the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (fuel system related) been recorded?
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Yes
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Go to the next step.
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No
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Record the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
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3
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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4
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VERIFY RELATED PENDING CODE AND/OR DTC
• Switch the ignition to off, then to ON (engine off).
• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
• Are any other PENDING CODEs and/or DTCs present?
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Yes
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Go to the applicable PENDING CODE or DTC inspection.
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No
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Go to the next step.
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5
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INSPECT HO2S
• Inspect the HO2S.
• Is there any malfunction?
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Yes
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Go to the next step.
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No
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Go to Step 7.
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6
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INSPECT EXHAUST GAS LEAKAGE
• Visually inspect for the exhaust gas leakage between the TWC and HO2S.
• Is there any leakage?
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Yes
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Repair or replace the malfunctioning part according to the inspection results, then go to Step 23.
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No
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Replace the HO2S, then go to Step 23.
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7
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INSPECT IAT SENSOR
• Inspect the IAT sensor.
• Is there any malfunction?
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Yes
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Replace the MAF/IAT sensor, then go to Step 23.
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No
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Go to the next step.
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8
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VERIFY CURRENT INPUT SIGNAL STATUS
• Access the following PIDs using the M-MDS:
• Are all PIDs normal?
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Yes
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Go to the next step.
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No
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Inspect the malfunctioning part.
• If there is any malfunction:
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9
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VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA CONDITION
• Access the same PIDs as in Step 8 while simulating the FREEZE FRAME DATA (Mode 2) condition.
• Are all PIDs normal?
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Yes
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Go to the next step.
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No
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Inspect the malfunctioning part.
• If there is any malfunction:
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10
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INSPECT A/F SENSOR
• Inspect the A/F sensor.
• Is there any malfunction?
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Yes
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Go to the next step.
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No
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Go to Step 12.
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11
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INSPECT EXHAUST GAS LEAKAGE
• Visually inspect for the exhaust gas leakage between the exhaust manifold and A/F sensor.
• Is there any leakage?
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Yes
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Repair or replace the malfunctioning part according to the inspection results, then go to Step 23.
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No
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Replace the A/F sensor, then go to Step 23.
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12
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VERIFY CURRENT INPUT SIGNAL STATUS OF MAF SENSOR
• Start the engine.
• Access the MAF PID using the M-MDS.
• Verify that the MAF PID changes quickly according to engine speed.
• Is the MAF PID value normal?
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Yes
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Go to Step 14.
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No
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Go to the next step.
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13
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INSPECT INTAKE-AIR SYSTEM FOR EXCESSIVE AIR SUCTION
• Visually inspect the hose in intake-air system for looseness, cracks or damages.
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part according to the inspection results, then go to Step 23.
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No
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Replace the MAF/IAT sensor, then go to Step 23.
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14
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INSPECT IGNITION SYSTEM OPERATION
• Perform the Spark Test.
• Is a strong blue spark visible at each cylinder?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning part according to the spark test result, then go to Step 23.
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15
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INSPECT ENGINE COMPRESSION
• Inspect the engine compression.
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part according to the inspection results, then go to Step 23.
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No
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Go to the next step.
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16
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INSPECT FUEL PRESSURE (HIGH-SIDE)
• Access the FUEL_PRES PID using the M-MDS.
• Is the FUEL_PRES PID value within the specification?
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Yes
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Go to Step 20.
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No
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Go to the next step.
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17
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IDENTIFY CAUSE BY FUEL PRESSURE SENSOR OR HIGH PRESSURE FUEL PUMP
• Is the vehicle accelerate performance normally?
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Yes
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Go to the next step.
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No
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Go to Step 19.
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18
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INSPECT FUEL PRESSURE SENSOR
• Inspect the fuel pressure sensor.
• Is there any malfunction?
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Yes
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Replace the fuel delivery pipe, then go to Step 23.
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No
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Go to Step 20.
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19
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INSPECT HIGH PRESSURE FUEL PUMP
• Replace the high pressure fuel pump
• Access the FUEL_PRES PID using the M-MDS.
• Is the FUEL_PRES PID value within the specification?
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Yes
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High-pressure fuel pump or spill valve control solenoid valve (built-in high pressure fuel pump) malfunction.
• Go to Step 23.
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No
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Relief valve malfunction.
• Replace the fuel delivery pipe, then go to Step 23.
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20
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INSPECT FUEL PRESSURE (LOW-SIDE)
• Connect the fuel pressure gauge between fuel pump and high pressure fuel pump.
• Measure the low side fuel pressure.
• Is the low side fuel pressure within the specification?
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Yes
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Go to the next step.
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No
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Inspect for the following.
• Fuel line restriction
• Fuel filter clogging
If there is no malfunction:
• Replace the fuel pump unit.
If there is any malfunction:
• Repair or replace the malfunctioning part according to the inspection results.
Go to Step 23.
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21
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INSPECT FUEL INJECTOR OPERATION
• Perform the Fuel Injector Operation Inspection.
• Do the fuel injectors operate properly?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning part according to the inspection results, then go to Step 23.
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22
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INSPECT ECT SENSOR
• Inspect the ECT sensor.
• Is there any malfunction?
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Yes
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Replace the ECT sensor, then go to the next step.
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No
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Go to the next step.
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23
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VERIFY DTC TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• After warming up the engine, maintain the idle status for 1 min or more.
• Perform the Pending Trouble Code Access Procedure.
• Is the PENDING CODE for this DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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24
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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DTC troubleshooting completed.
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