DTC P1145 [MZ-CD 1.6 (Y6) (EURO4 emission level)]

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DTC P1145

Calculated torque error
DETECTION CONDITION
•  Base torque map - Not plausible
POSSIBLE CAUSE
•  Erratic signal from fuel pressure sensor
•  Fuel injector malfunction
•  Fuel metering control valve malfunction
•  Fuel leakage or clogging in fuel system
•  Fuel injection control improper operation
•  Turbo charging system improper operation
•  Engine malfunction (low compression or excessive friction loss)
•  Fuel limiter malfunction
•  Fuel metering valve malfunction
•  Fuel 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
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
•  Is P1145 on FREEZE FRAME DATA?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
No
Go to the next step.
4
INSPECT FUEL LINE
•  Inspect for leakage or clogging in the following fuel lines for each cylinder.
―  Fuel supply pump and common rail
―  Common rail and fuel injector
•  Is there any malfunction?
Yes
Repair or replace the suspected fuel line, then go to Step 10.
No
Go to the next step.
5
INSPECT FUEL METERING VALVE
•  Inspect the fuel metering valve.
•  Is there any malfunction?
Yes
Replace the fuel metering valve, then go to Step 10.
(See SUPPLY PUMP REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)
No
Go to the next step.
6
INSPECT FUEL PRESSURE SENSOR
•  Inspect the fuel pressure sensor.
•  Inspect the fuel pressure sensor.
Yes
Replace the common rail, then go Step 10.
(See COMMON RAIL REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)
No
Go to the next step.
7
INSPECT FUEL INJECTOR
•  Inspect the fuel injector.
•  Is there any malfunction?
Yes
Replace the fuel injector, then go to Step 10.
(See FUEL INJECTOR REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)
No
Go to the next step.
8
INSPECT TURBO CHARGING SYSTEM OPERATION
•  Inspect the following turbo charging system related parts.
―  Intake-air system hose, piping (leakage, loose installation)
―  Charge air cooler
―  Turbocharger
―  VBC solenoid valve
―  Vacuum hose routine (vacuum pump—VBC solenoid valve—guide blade actuator)
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part, then go to Step 10.
No
Go to the next step.
9
INSPECT ENGINE COMPRESSION
•  Measure the engine compression.
•  Is the engine compression correct?
Yes
Inspect for the following:
•  Supply pump
•  Engine friction loss
If malfunction is appeared, replace the suspected part.
Then go to the next step.
If it is normal, go to the next step.
No
Inspect for the following:
•  Damaged valve sheet
•  Worn valve stem and valve guide
•  Worn or stuck piston ring
•  Worn piston or cylinder
•  Improper valve timing
If malfunction is appeared, replace the suspected part.
Then go to the next step.
If it is normal, go to the next step.
10
VERIFY THAT DTC P1145 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.
11
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 (Y6) (EURO4 emission level)].)
No
DTC troubleshooting completed.