DTC P2177:00 [MZ-CD 1.6]

id0102g8708900

DTC P2177:00

System too lean off idle
DETECTION CONDITION
•  The PCM monitors the oxygen concentration using the A/F sensor. If the measured value or the calculated value of the oxygen concentration when driving under a load is higher than the threshold, the PCM determines that the system is too lean.
POSSIBLE CAUSE
•  Engine oil deterioration (High amount of fuel mixed in engine oil)
•  Fuel injector malfunction
•  Leakage in fuel line (High-pressure side, Low-pressure side)
•  A/F sensor malfunction
•  Fuel injection pump learned values reset improper
•  Fuel metering valve malfunction
•  Supply pump malfunction
•  PCM malfunction

Diagnostic procedure

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.
•  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
INSPECT FUEL INJECTOR
•  Inspect the fuel injectors.
•  Is there any malfunction?
Yes
Replace the fuel injector, then go to Step 8.
(See FUEL INJECTOR REMOVAL/INSTALLATION [MZ-CD 1.6].)
No
Go to the next step.
5
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 8.
No
Go to the next step.
6
INSPECT A/F SENSOR
•  Inspect the A/F sensor.
•  Is there any malfunction?
Yes
Replace the A/F sensor, then go to Step 8.
No
Go to the next step.
7
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.
•  Run the vehicle under the FREEZE FRAME DATA stored condition.
•  Is the same DTC present?
Yes
Replace the fuel metering valve.
(See SUPPLY PUMP REMOVAL/INSTALLATION [MZ-CD 1.6].)
Then go to the next step.
No
Go to Step 9.
8
VERIFY THAT DTC P2177:00 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.
Go to the next step.
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
•  Perform the after repair procedure.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6].)
No
DTC troubleshooting completed.