DTC P2297:00 [MZ-CD 1.6]

DTC P2297:00	A/F sensor out of range during deceleration
DETECTION CONDITION	• The PCM monitors the oxygen concentration using the A/F sensor. If the sum of or difference between the measured value and the calculated is outside of the allowable range, the PCM determines that the A/F sensor is out of range during deceleration.
POSSIBLE CAUSE	• Engine oil deterioration (High amount of fuel mixed in engine oil) • Fuel injector malfunction • Air restriction or leakage at intake-air system • Leakage in fuel line (High-pressure side, Low-pressure side) • A/F sensor malfunction • Fuel injection pump learned values reset improper • Supply pump malfunction • PCM malfunction

DTC P2297:00

A/F sensor out of range during deceleration

DETECTION CONDITION

• The PCM monitors the oxygen concentration using the A/F sensor. If the sum of or difference between the measured value and the calculated is outside of the allowable range, the PCM determines that the A/F sensor is out of range during deceleration.

POSSIBLE CAUSE

• Engine oil deterioration (High amount of fuel mixed in engine oil)

• Fuel injector malfunction

• Air restriction or leakage at intake-air system

• Leakage in fuel line (High-pressure side, Low-pressure side)

• A/F sensor malfunction

• Fuel injection pump learned values reset improper

• Supply pump malfunction

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the 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 REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No	Go to the next step.
3	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. (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6].) • Is the other PENDING CODE/DTC also present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZ-CD 1.6].)
No	Go to the next step.
4	VERIFY ENGINE OIL CONDITION • Verify the engine oil condition (amount, color, smell) (See ENGINE OIL LEVEL INSPECTION [MZ-CD 1.6].) • Is the engine oil condition normal?	Yes	Go to the next step.
No	Replace the engine oil, then go to Step 10. (See ENGINE OIL REPLACEMENT [MZ-CD 1.6].)
5	INSPECT FUEL INJECTOR • Inspect the fuel injectors. (See FUEL INJECTOR INSPECTION [MZ-CD 1.6].) • Is there any malfunction?	Yes	Replace the fuel injector, then go to Step 10. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZ-CD 1.6].)
No	Go to the next step.
6	INSPECT FUEL LINE FOR LEAKAGE • Switch the ignition to off. • Inspect for fuel leakage in the following fuel lines: ― Fuel tank and fuel filter ― Fuel filter and supply pump ― Supply pump and common rail ― Common rail and fuel injector • Is there any malfunction?	Yes	Repair or replace suspect fuel line, then go to Step 9.
No	Go to the next step.
7	INSPECT AIR RESTRICTION OR LEAKAGE AT INTAKE-AIR SYSTEM • Inspect the intake-air system for air restriction or leakage. • Is there any air restriction or leakage?	Yes	Repair or replace malfunctioning part, then go to Step 10.
No	Go to the next step.
8	INSPECT A/F SENSOR • Inspect the A/F sensor. • Is there any malfunction?	Yes	Replace the A/F sensor, then go to Step 10.
No	Go to the next step.
9	PERFORM FUEL INJECTION PUMP LEARNED VALUES RESET • Clear the DTC from the PCM memory using the M-MDS. • Perform the FUEL INJECTION PUMP LEARNED VALUES RESET. (See FUEL INJECTION PUMP LEARNED VALUES RESET [MZ-CD 1.6].) • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Replace the supply pump. (Fuel metering valve malfunction) Then go to the next step.
No	Go to Step 11.
10	VERIFY THAT DTC P2297:00 TROUBLESHOOTING IS COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6].) Go to the next step.
No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE • Perform the after repair procedure. (See AFTER REPAIR PROCEDURE [MZ-CD 1.6].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZ-CD 1.6].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED

• Has the FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

Record the FREEZE FRAME DATA on the repair order, then go to the next step.

VERIFY RELATED REPAIR INFORMATION AVAILABILITY

• Verify related service repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

Go to the next step.

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.

(See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6].)

• Is the other PENDING CODE/DTC also present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [MZ-CD 1.6].)

Go to the next step.

VERIFY ENGINE OIL CONDITION

• Verify the engine oil condition (amount, color, smell)

(See ENGINE OIL LEVEL INSPECTION [MZ-CD 1.6].)

• Is the engine oil condition normal?

Yes

Go to the next step.

Replace the engine oil, then go to Step 10.

(See ENGINE OIL REPLACEMENT [MZ-CD 1.6].)

INSPECT FUEL INJECTOR

• Inspect the fuel injectors.

(See FUEL INJECTOR INSPECTION [MZ-CD 1.6].)

• Is there any malfunction?

Yes

Replace the fuel injector, then go to Step 10.

(See FUEL INJECTOR REMOVAL/INSTALLATION [MZ-CD 1.6].)

Go to the next step.

INSPECT FUEL LINE FOR LEAKAGE

• Switch the ignition to off.

• Inspect for fuel leakage in the following fuel lines:

― Fuel tank and fuel filter

― Fuel filter and supply pump

― Supply pump and common rail

― Common rail and fuel injector

• Is there any malfunction?

Yes

Repair or replace suspect fuel line, then go to Step 9.

Go to the next step.

INSPECT AIR RESTRICTION OR LEAKAGE AT INTAKE-AIR SYSTEM

• Inspect the intake-air system for air restriction or leakage.

• Is there any air restriction or leakage?

Yes

Repair or replace malfunctioning part, then go to Step 10.

Go to the next step.

INSPECT A/F SENSOR

• Inspect the A/F sensor.

• Is there any malfunction?

Yes

Replace the A/F sensor, then go to Step 10.

Go to the next step.

PERFORM FUEL INJECTION PUMP LEARNED VALUES RESET

• Clear the DTC from the PCM memory using the M-MDS.

• Perform the FUEL INJECTION PUMP LEARNED VALUES RESET.

(See FUEL INJECTION PUMP LEARNED VALUES RESET [MZ-CD 1.6].)

• Run the vehicle under the FREEZE FRAME DATA stored condition.

• Is the same DTC present?

Yes

Replace the supply pump.

(Fuel metering valve malfunction)

Then go to the next step.

Go to Step 11.

VERIFY THAT DTC P2297:00 TROUBLESHOOTING IS COMPLETED

• Make sure to reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

• Run the vehicle under the FREEZE FRAME DATA stored condition.

• Is the same DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

(See PCM REMOVAL/INSTALLATION [MZ-CD 1.6].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the after repair procedure.

(See AFTER REPAIR PROCEDURE [MZ-CD 1.6].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [MZ-CD 1.6].)

DTC troubleshooting completed.