DTC P2096:00 [L3 Turbo]SM2444167
DTC P2096:00 [L3 Turbo]

id0102b7900400

DTC P2096:00

Target A/F feedback system too lean
DETECTION CONDITION
• The PCM monitors the target A/F fuel trim while under 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.
MONITORING CONDITIONS
― HO2S voltage: more than 0.1 V
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 the first drive cycle.
• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
• DTCs are stored in the PCM memory.
POSSIBLE CAUSE
• Exhaust gas leakage
• 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
• 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
― Fuel pressure sensor (built-in fuel delivery pipe) malfunction
― Relief valve (built-in fuel delivery pipe) malfunction
― Spill valve control solenoid valve (built-in high pressure fuel pump) malfunction
― High pressure fuel pump malfunction
• Low-pressure side fuel delivery system malfunction
― Fuel pump unit malfunction
― Fuel pressure regulator (built-in fuel pump unit) malfunction
― Leakage fuel in low-pressure side fuel line (between fuel pump unit and high pressure fuel pump)
• 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. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Is the DTC P2096:00 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 [L3 Turbo].)
2
VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED
• Have the 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
• Turn the ignition switch off, then to the ON position (engine off).
• Perform the DTC Reading Procedure and Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Are any other DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [L3 Turbo].)
No
Go to the next step.
5
INSPECT HO2S
• Inspect the HO2S. (See HEATED OXYGEN SENSOR (HO2S) INSPECTION [L3 Turbo].)
• 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 part according to the inspection results, then go to Step 23.
No
Replace the HO2S, then go to Step 23.
(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [L3 Turbo].)
7
INSPECT IAT SENSOR
• Inspect the IAT sensor. (See INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [L3 Turbo].)
• Is there any malfunction?
Yes
Replace the MAF/IAT sensor, then go to Step 23.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to the next step.
8
VERIFY CURRENT INPUT SIGNAL STATUS
• Access the following PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
― ECT
― MAF
― TP REL
― VSS
• Are the PIDs normal? (See PCM INSPECTION [L3 Turbo].)
Yes
Go to the next step.
No
Inspect the malfunctioning part.
• If there is any malfunction:
― Repair or replace the malfunctioning part according to the inspection results, then go to Step 23.
9
VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA (MODE 2) CONDITION
• Access the same PIDs as in Step 8 while simulating the FREEZE FRAME DATA (Mode 2) condition. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Are the PIDs normal? (See PCM INSPECTION [L3 Turbo].)
Yes
Go to the next step.
No
Inspect the malfunctioning part.
• If there is any malfunction:
― Repair or replace the malfunctioning part according to the inspection results, then go to Step 23.
10
INSPECT A/F SENSOR
• Inspect the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [L3 Turbo].)
• 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 part according to the inspection results, then go to Step 23.
No
Replace the A/F sensor, then go to Step 23.
(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [L3 Turbo].)
12
VERIFY CURRENT INPUT SIGNAL STATUS OF MAF SENSOR
• Start the engine.
• Access the MAF PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Verify that the MAF PID changes quickly according to engine speed.
• Is the MAF PID value normal? (See PCM INSPECTION [L3 Turbo].)
Yes
Go to Step 14.
No
Go to the next step.
13
INSPECT INTAKE-AIR SYSTEM FOR EXCESSIVE AIR SUCTION
• Visually inspect the hose in intake-air system for looseness, cracks or damages.
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 23.
No
Replace the MAF/IAT sensor, then go to Step 23.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L3 Turbo].)
14
INSPECT IGNITION SYSTEM OPERATION
• Perform the Spark Test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 Turbo].)
• 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 spark test result, then go to Step 23.
15
INSPECT ENGINE COMPRESSION
• Inspect the engine compression. (See COMPRESSION INSPECTION [L3 Turbo].)
• Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 23.
No
Go to the next step.
16
INSPECT FUEL PRESSURE (HIGH-SIDE)
• Access the FUEL_PRES PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 Turbo].)
Yes
Go to Step 20.
No
Go to the next step.
17
IDENTIFY CAUSE BY FUEL PRESSURE SENSOR OR HIGH PRESSURE FUEL PUMP
• Is the vehicle accelerate performance normally?
Yes
Go to the next step.
No
Go to Step 19.
18
INSPECT FUEL PRESSURE SENSOR
• Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 Turbo].)
• Is there any malfunction?
Yes
Replace the fuel delivery pipe, then go to Step 23.
(See FUEL INJECTOR REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to Step 20.
19
INSPECT HIGH PRESSURE FUEL PUMP
• Replace the high pressure fuel pump (See HIGH PRESSURE FUEL PUMP REMOVAL/INSTALLATION [L3 Turbo].)
• Access the FUEL_PRES PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 Turbo].)
Yes
High-pressure fuel pump or spill valve control solenoid valve (built-in high pressure fuel pump) malfunction.
• Go to Step 23.
No
Relief valve malfunction.
• Replace the fuel delivery pipe, then go to Step 23. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 Turbo].)
20
INSPECT FUEL PRESSURE (LOW-SIDE)
• Connect the fuel pressure gauge between fuel pump and high pressure fuel pump.
• Measure the low side fuel pressure. (See FUEL LINE PRESSURE INSPECTION [L3 Turbo].)
• Is the low side fuel pressure within the specification?
Yes
Go to the next step.
No
Inspect for the following.
• Fuel line restriction
• Fuel filter clogging
― If there is no malfunction:
• Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L3 Turbo].)
― If there is any malfunction:
• Repair or replace the malfunctioning part according to the inspection results.
Go to Step 23.
21
INSPECT FUEL INJECTOR
• Inspect the fuel injector. (See FUEL INJECTOR INSPECTION [L3 Turbo].)
• Is there any malfunction?
Yes
Replace the fuel injector, then go to Step 23.
(See FUEL INJECTOR REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to the next step.
22
INSPECT ECT SENSOR
• Inspect the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [L3 Turbo].)
• Is there any malfunction?
Yes
Replace the ECT sensor, then go to the next step.
(See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to the next step.
23
VERIFY DTC TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [L3 Turbo].)
• After warming up the engine, maintain the idle status for 1 min or more.
• Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to the next step.
24
VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L3 Turbo].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [L3 Turbo].)
No
DTC troubleshooting completed.