DTC P2196, P2198 [MZI-3.7]

id0102d2953300

DTC P2196

DTC P2198

P2196: Front HO2S (RH) signal stuck rich

P2198: Front HO2S (LH) signal stuck rich
DETECTION CONDITION
•  A HO2S indicating rich at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time
POSSIBLE CAUSE
•  Erratic signal to PCM
―  APP sensor signal malfunction
―  ECT sensor signal malfunction
―  IAT sensor signal malfunction
―  MAF sensor signal malfunction
―  CKP sensor signal malfunction
―  TP sensor signal malfunction
―  VSS signal malfunction
―  Related connector and terminal malfunction
―  Related wiring harness malfunction
•  Air suction at intake-air system malfunction
•  MAF sensor malfunction
•  Leakage exhaust gas
•  Front HO2S malfunction
•  Fuel injector malfunction
•  Insufficient fuel line pressure
•  Leakage fuel
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•   Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record 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
Perform the PCM reprogramming procedure.
Then go to the next step.
3
VERIFY RELATED PENDING CODE OR STORED DTCs
•  Turn the ignition switch off then to the ON position (Engine off).
•  Verify the related PENDING CODE or stored DTCs using the M-MDS.
Yes
Go to the appropriate DTC troubleshooting.
(See DTC TABLE [MZI-3.7].)
No
Go to the next step.
4
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
•  Is DTC P2196 or P2198 on the FREEZE FRAME DATA?
Yes
Go to the next step.
No
Go to the troubleshooting for the DTC on the FREEZE FRAME DATA.
(See DTC TABLE [MZI-3.7].)
5
VERIFY CURRENT INPUT SIGNAL STATUS
•  Connect the M-MDS to the DLC-2.
•  Verify the following PIDs.
―  APP1
―  APP2
―  APP3
―  ECT
―  MAF
―  TP_REL
―  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
―  APP3
―  ECT
―  MAF
―  TP_REL
―  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
Inspect for air suction in intake-air system.
If there is no air suction, replace the MAF/IAT sensor, then go to Step 11.
8
INSPECT FRONT HO2S
•  Inspect the front HO2S (RH) (with DTC P2195) or the front HO2S (LH) (with DTC P2197).
•  Is there any malfunction?
Yes
Inspect the related wiring harnesses and exhaust gas leakage.
If there is no malfunction replace the HO2S, then go to Step 11.
No
Go to the next step.
9
INSPECT FUEL INJECTOR
•  Inspect the fuel injector for the right bank (with DTC P2196) or the left bank (with DTC P2198).
•  Is there any malfunction?
Yes
Replace the suspected fuel injector, then go to Step 11.
(See FUEL INJECTOR REMOVAL/INSTALLATION [MZI-3.7].)
No
Go to the next step.
10
INSPECT FUEL LINE PRESSURE
•  Perform the “FUEL LINE PRESSURE INSPECTION”.
•  Is there any malfunction?
Yes
Replace the malfunctioning part. Go to the next step.
No
Go to the next step.
11
VERIFY TROUBLESHOOTING OF DTC P2196, P2198 HAS BEEN COMPLETED
•  Verify that all disconnected connectors are reconnected.
•  Turn the ignition switch to the ON position (Engine off).
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform no load racing at the engine speed of 2,500—3,500 rpm for 60s or more, then idle the engine for 60s or more.
•  Perform KOEO and KOER self-test.
•  Retrieve DTCs using the M-MDS.
•  Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZI-3.7].)
No
Go to the next step.
12
VERIFY AFTER REPAIR PROCEDURE
•  Perform “AFTER REPAIR PROCEDURE”.
•  Are any DTC present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7].)
No
Troubleshooting completed.