DTC P2096:00 [MZR 1.8, MZR 2.0, MZR 2.5]

id0102f4707500

DTC P2096:00

Target A/F feedback system too lean
DETECTION CONDITION
•  The PCM monitors the target A/F fuel trim when 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.
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
―  Related connector or terminals malfunction
―  Related wiring harness malfunction
•  Leakage exhaust gas (between exhaust manifold and A/F sensor)
•  A/F sensor malfunction
•  Air suction in intake air system
•  MAF sensor malfunction
•  Fuel supply system malfunction or improper fuel line pressure
―  Fuel leakage in fuel line between fuel distributor and fuel pump
―  Pressure regulator malfunction (built-in fuel pump unit)
―  Fuel pump unit malfunction
―  Fuel filter clogged
•  Ignition system malfunction
―  Ignition coil related wiring harness malfunction
―  Spark plug malfunction
―  Ignition coil malfunction
•  Insufficient engine compression
•  Fuel injector operation malfunction
―  Fuel injector related wiring harness malfunction
―  Fuel injector malfunction
•  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 P2096:00 on FREEZE FRAME DATA (Mode 2)?
Yes
Go to the next step.
No
Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA (Mode 2).
(See DTC TABLE [MZR 1.8, 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 the 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/OR DTC
•  Switch the ignition to off, then to ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Is the PENDING CODE/DTC P2177:00 or P2187:00 also present?
Yes
Go to the applicable PENDING CODE or DTC inspection.
(See DTC P2177:00 [MZR 1.8, MZR 2.0, MZR 2.5].)
(See DTC P2187:00 [MZR 1.8, MZR 2.0, MZR 2.5].)
No
Go to the next step.
5
INSPECT CURRENT SIGNAL STATUS OF HO2S
•  Inspect the HO2S.
•  Is there any malfunction?
Yes
Go to the next step.
No
Go to Step 7.
6
INSPECT GAS LEAKAGE FROM EXHAUST SYSTEM
•  Visually inspect for the exhaust gas leakage between TWC and HO2S.
•  Is there any leakage?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
No
Replace the HO2S, then go to Step 21.
(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)
7
INSPECT IAT SENSOR
•  Inspect the IAT sensor.
•  Is there any malfunction?
Yes
Replace the MAF/IAT sensor, then go to Step 21.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)
No
Go to the next step.
8
VERIFY CURRENT INPUT SIGNAL STATUS
•  Access the following PIDs using the M-MDS:
―  ECT
―  MAF
―  TP REL
―  VSS
•  Is there any signal that is far out of specification when the ignition is switched to ON and the engine idles?
Yes
Inspect the suspected sensor and related wiring harness.
Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
No
Go to the next step.
9
VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA (MODE 2) CONDITION
Caution
•  While performing this step, always operate the vehicle in a safe and lawful manner.
•  When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.
•  Access the same PIDs as in Step 8 while simulating under the FREEZE FRAME DATA (Mode 2) conditions.
•  Is there any signal which causes drastic changes?
Yes
Inspect the suspected sensor and related wiring harness.
Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
No
Go to the next step.
10
INSPECT SIGNAL STATUS OF 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 GAS LEAKAGE FROM EXHAUST SYSTEM
•  Visually inspect for the exhaust gas leakage between exhaust manifold and A/F sensor.
•  Is there any leakage?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
No
Replace the A/F sensor, then go to Step 21.
(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)
12
VERIFY CURRENT INPUT SIGNAL STATUS OF MAF SENSOR
•  Start the engine.
•  Access the MAF PID using the M-MDS.
•  Verify that the MAF PID value changes quickly according to the engine speed.
•  Is the MAF PID value normal?
Yes
Go to Step 14.
No
Go to the next step.
13
INSPECT FOR EXCESSIVE AIR SUCTION OF INTAKE AIR SYSTEM
•  Visually inspect for loosen, cracks or damages hoses on the intake air system.
Note
•  Engine speed may change when rust penetrating agent is sprayed on the air suction area.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
No
Replace the MAF/IAT sensor, then go to Step 21.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)
14
INSPECT FUEL LINE PRESSURE
Note
•  If the engine will not start, inspect the fuel line pressure with ignition is switched to ON.
•  Inspect the fuel line pressure while the engine running.
•  Is there any malfunction?
Yes
If the fuel line pressure is too low:
•  Go to the next step.
If the fuel line pressure is too high:
•  Replace the fuel pump unit, then go to Step 21.
No
Go to Step 17.
15
INSPECT FUEL LINE LEAKAGE
•  Visually inspect the leakage from fuel line between fuel distributor and fuel pump unit.
•  Is there any leakage?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
No
Go to the next step.
16
INSPECT FUEL FILTER
•  Visually inspect the foreign materials or stain inside fuel filter (low-pressure side).
•  Is there any foreign materials or stain?
Yes
Clean the fuel tank and filter (low-pressure side), then go to Step 21.
No
Replace the fuel pump unit, then go to Step 21.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)
17
INSPECT IGNITION SYSTEM OPERATION
•  Perform the Spark Test.
•  Is a strong blue spark visible at each cylinder?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
18
INSPECT ENGINE COMPRESSION
•  Inspect the engine compression.
•  Is there any malfunction?
Yes
Overhaul the engine for repairs, then go to Step 21.
No
Go to the next step.
19
INSPECT FUEL INJECTOR OPERATION
•  Perform the Fuel Injector Operation Inspection.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 21.
No
Go to the next step.
20
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 1.8, MZR 2.0, MZR 2.5].)
No
Go to the next step.
21
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the Drive Mode 01 (PCM Adaptive Memory Produce Drive Mode).
•  Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].)
No
Go to the next step.
22
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 1.8, MZR 2.0, MZR 2.5].)
No
DTC troubleshooting completed.