DTC P2097:00 [MZR 2.0, MZR 2.5]

id0102g3707600

DTC P2097:00

Target A/F feedback system too rich
DETECTION CONDITION
•  The PCM monitors the target A/F fuel trim when under the target A/F feedback control. If the fuel trim is less than specification, the PCM determines that the target A/F feedback system is too rich.
Diagnostic support note
•  This is a continuous monitor (fuel system).
•  The MIL illuminates if the PCM detects the above malfunctioning 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 conditions during first drive cycle.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  Leakage exhaust gas (between TWC and HO2S)
•  HO2S malfunction
•  IAT sensor malfunction
•  Erratic signal to PCM
―  ECT sensor signal malfunction
―  MAF sensor signal malfunction
―  TP sensor signal malfunction
―  VSS signal malfunction
•  Leakage exhaust gas (between exhaust manifold and A/F sensor)
•  A/F sensor malfunction
•  Fuel supply system malfunction or improper fuel line pressure
―  Pressure regulator malfunction (built-in fuel pump unit)
―  Fuel pump unit malfunction
•  Purge solenoid valve malfunction
•  Ignition system malfunction
―  Spark plug malfunction
―  Ignition coil related wiring harness malfunction
―  Ignition coil malfunction
•  Fuel injector operation malfunction
―  Fuel injector related wiring harness malfunction
―  Fuel injector malfunction
•  Insufficient engine compression
•  ECT sensor malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2)
•  Perform the Freeze Frame PID Data Access Procedure.
•  Is the DTC P2097:00 on FREEZE FRAME DATA (Mode 2)?
Yes
Go to the next step.
No
Go to the troubleshooting procedures for DTC on FREEZE FRAME DATA (Mode 2).
(See DTC TABLE [MZR 2.0, MZR 2.5].)
2
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?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on repair order, then go to the next step.
3
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.
4
VERIFY RELATED PENDING CODE AND STORED DTC
•  Switch the ignition to off, then to ON (engine off).
•  Perform the DTC Reading Procedure and Pending Trouble Code Access Procedure.
•  Are any other DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 2.0, MZR 2.5].)
No
Go to the next step.
5
INSPECT HO2S
•  Inspect the HO2S.
•  Is there any malfunction?
Yes
Go to the next step.
No
Go to Step 7.
6
INSPECT EXHAUST GAS LEAKAGE
•  Visually inspect for the exhaust gas leakage between the TWC and HO2S.
•  Is there any leakage?
Yes
Repair or replace the malfunctioning parts according to the inspection results, then go to Step 19.
No
Replace the HO2S, then go to Step 19.
(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)
7
INSPECT IAT SENSOR
•  Switch the ignition to off.
•  Inspect the IAT sensor.
•  Is there any malfunction?
Yes
Replace the MAF/IAT sensor, then go to Step 19.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)
No
Go to the next step.
8
VERIFY CURRENT INPUT SIGNAL STATUS
•  Connect the M-MDS to the DLC-2.
•  Access the following PIDs using the M-MDS.
―  ECT
―  MAF
―  TP REL
―  VSS
•  Are the PIDs normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts according to the inspection results, then go to Step 19.
9
VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA (MODE 2) CONDITION
•  Connect the M-MDS to the DLC-2.
•  Access the following PIDs using the M-MDS under the FREEZE FRAME DATA (Mode 2) condition.
―  ECT
―  MAF
―  TP REL
―  VSS
•  Are the PIDs normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts according to the inspection results, then go to Step 19.
10
INSPECT A/F SENSOR
•  Inspect the A/F sensor.
•  Is there any malfunction?
Yes
Go to the next step.
No
Go to Step 12.
11
INSPECT EXHAUST GAS LEAKAGE
•  Visually inspect for the exhaust gas leakage between the exhaust manifold and A/F sensor.
•  Is there any leakage?
Yes
Repair or replace the malfunctioning parts according to the inspection results, then go to Step 19.
No
Replace the A/F sensor, then go to Step 19.
(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)
12
INSPECT FUEL LINE PRESSURE
•  Switch the ignition to off.
Note
•  If engine will not start, inspect fuel line pressure with ignition is switched to ON.
•  Inspect fuel line pressure while engine running.
•  Is there any malfunction?
Yes
If fuel pressure is too high:
•  Replace the fuel pump unit, then go to Step 19.
If fuel pressure is low:
•  Go to the next step.
No
Go to the next step.
13
INSPECT LONG TERM FUEL TRIM
•  Connect the M-MDS to the DLC-2.
•  Access the LONGFT1 PID using the M-MDS.
•  Compare the LONGFT1 PID with recorded snapshot data at Step 1.
•  Is the LONGFT1 PID above snapshot data value?
Yes
Go to the next step.
No
Go to Step 15.
14
INSPECT PURGE SOLENOID VALVE
•  Switch the ignition to off.
•  Perform the Purge Control System Inspection.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning parts according to the inspection results, then go to Step 19.
No
Go to the next step.
15
INSPECT IGNITION SYSTEM OPERATION
•  Carry out the spark test.
•  Is strong blue spark visible at each cylinder?
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts according to the inspection results, then go to Step 19.
16
INSPECT FUEL INJECTOR OPERATION
•  Perform the Fuel Injector Operation Inspection.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning parts according to the inspection results, then go to Step 19.
No
Go to the next step.
17
INSPECT ENGINE COMPRESSION
•  Inspect the engine compression.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning parts according to the inspection results, then go to Step 19.
No
Go to the next step.
18
INSPECT ECT SENSOR
•  Inspect the ECT sensor.
•  Is there any malfunction?
Yes
Replace the ECT sensor, then go to the next step.
(See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)
No
Go to the next step.
19
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?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
20
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 2.0, MZR 2.5].)
No
DTC troubleshooting completed.