DTC P2196 [MTX, LF ATX (FS5A-EL)]

id0102b4812800

DTC P2196

A/F sensor signal stuck rich
DETECTION CONDITION
•  The PCM monitors the A/F sensor output current when the following conditions are met. If the average output current is less than 0.85 A for 25 s, the PCM determines that the A/F sensor signal remains rich.
MONITORING CONDITION
―  ECT: more than 70 °C {158 °F}
―  Engine speed: 1,000—3,200 rpm
―  Charging efficiency: 20—62.5%
―  Output voltage from the A/F sensor: less than 0.7 V
Diagnostic support note
•  This is an intermittent monitor (A/F sensor, HO2S).
•  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 the first drive cycle.
•  FREEZE FRAME DATA is available.
•  Are any DTCs is stored in the PCM memory.
POSSIBLE CAUSE
•  A/F sensor malfunction
•  Fuel injector malfunction
•  Excessive fuel pressure
•  Restriction in intake-air system
•  MAF sensor malfunction
•  ECT sensor malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAVE BEEN RECORDED
•  Have 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 RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE OR STORED DTC
•  Turn the ignition switch off, then ON position (Engine off).
•  Verify the related PENDING CODE or stored DTCs.
•  Is the DTC P2177 or P2187 also present?
Yes
Go to the appropriate DTC inspection.
(See DTC TABLE [MTX, LF ATX (FS5A-EL)].)
No
Go to the next step.
4
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
•  Is DTC P2196 on FREEZE FRAME DATA?
Yes
Go to the next step.
No
Go to FREEZE FRAME DATA DTC inspection.
(See DTC TABLE [MTX, LF ATX (FS5A-EL)].)
5
VERIFY CURRENT INPUT SIGNAL STATUS
•  Connect the M-MDS to the DLC-2.
•  Verify the following PIDs.
―  APP1
―  APP2
―  ECT
―  MAF
―  TP1
―  VSS
•  Are the PIDs normal?
Yes
Go to the next step.
No
Inspect the malfunctioning part according to the inspection results.
Then go to Step 11.
6
VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA CONDITION
•  Connect the M-MDS to the DLC-2.
•  Verify the following PIDs under the FREEZE FRAME DATA condition.
―  APP1
―  APP2
―  ECT
―  MAF
―  TP1
―  VSS
•  Are the PIDs normal?
Yes
Go to the next step.
No
Inspect the malfunctioning part according to the inspection results.
Then go to Step 11.
7
VERIFY CURRENT INPUT SIGNAL STATUS OF MAF SENSOR
•  Connect the M-MDS to the DLC-2.
•  Start the engine.
•  Access the MAF PID.
•  Verify that the MAF PID changes quickly according to engine speed.
•  Is the PID normal?
Yes
Go to the next step.
No
Replace the MAF/IAT sensor, then go to Step 11.
8
INSPECT A/F SENSOR
•  Inspect the A/F sensor.
•  Is there any malfunction?
Yes
Replace the A/F sensor, then go to Step 11.
(See EXHAUST SYSTEM REMOVAL/INSTALLATION [LF, L3].)
No
Go to the next step.
9
INSPECT FUEL INJECTOR
•  Inspect fuel injector.
•  Is there any malfunction?
Yes
Replace suspected fuel injector, then go to Step 11.
(See FUEL INJECTOR REMOVAL/INSTALLATION [LF, L3].)
No
Go to the next step.
10
INSPECT FUEL LINE PRESSURE
•  Perform the “FUEL LINE PRESSURE INSPECTION”.
•  Is there any malfunction?
Yes
Replace the fuel pump unit, then go to the next step.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [LF, L3].)
No
Go to the next step.
11
VERIFY TROUBLESHOOTING OF DTC P2196 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the PCM Adopted Memory Produce Drive Mode and A/F sensor heater, HO2S heater, and TWC Repair Verification Drive Mode.
•  Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [LF, L3].)
No
Go to the next step.
12
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Is any DTC present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MTX, LF ATX (FS5A-EL)].)
No
Troubleshooting completed.