DTC P1142:00 [PCM (SKYACTIV-D 2.2)]

id0102j5885000

DTC P1142:00	Fuel injection amount system: Output restriction
DETECTION CONDITION	•  When any of the following conditions is met: ―  Output value of exhaust gas pressure sensor No.1 is specified value or more ―  Output value of manifold absolute pressure (MAP) sensor No.1 is specified value or more ―  Turbocharger control system: Overboost Diagnostic support note •  This is a continuous monitor (other). •  The check engine light does not illuminate. •  FREEZE FRAME DATA/Snapshot data is available. •  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	•  Fuel injection amount is decreased.
POSSIBLE CAUSE	•  Fuel injector No.1 to No.4 malfunction •  Turbocharger malfunction •  Variable turbine geometry turbocharger actuator position sensor malfunction •  Variable turbine geometry turbocharger actuator malfunction •  Exhaust gas pressure sensor No.1 malfunction •  MAP sensor No.1 malfunction •  PCM malfunction
SYSTEM WIRING DIAGRAM	Not applicable

Diagnostic Procedure

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION Note •  Recording can be facilitated using the screen capture function of the PC. •  Record the freeze frame data/snap shot data.	―	Go to the next step.
2	VERIFY OTHER RELATED DTCs •  Switch the ignition OFF, and then switch it ON (engine off). •  Display the DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) •  Has any DTC other than P1142:00 been stored?	Yes	If DTC P2106:00 is stored •  Repair the malfunctioning location according to the P2106 DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D 2.2)].) If DTC P004A:00, P004B:00, or P16A6:00 is stored •  Go to the next step. If DTC other than P2106:00, P004A:00, P004B:00, and P16A6:00 is stored •  Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
		No	Go to the next step.
3	VERIFY AVERAGE DISTANCE INTERVAL OF diesel particulate filter REGENERATION TO DETERMINE IF MALFUNCTION IS CAUSED BY INJECTOR SYSTEM Note •  If the diesel particulate filter has been replaced and the diesel particulate filter data has been reset in the past, or the PCM has been replaced, use the traveled distance from the time of the related servicing until the time the vehicle was brought in. •  Perform the following procedure: 1.  Display the following PID diesel particulate filter_REG_CNT using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) 2.  Divide the current traveled distance (odometer display) by the value of PID diesel particulate filter_REG_CNT and verify the average value of the diesel particulate filter regeneration interval. •  Average value of the diesel particulate filter regeneration interval equals traveled distance divided by value of PID diesel particulate filter_REG_CNT •  Is the average value of the diesel particulate filter regeneration interval 140 km or more?	Yes	Go to the next step.
		No	Replace the fuel injector, then go to Step 7. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
4	DETERMINE IF MALFUNCTION IS CAUSED BY TURBOCHARGER •  Switch the ignition OFF. •  Switch the ignition ON (engine on). •  Display PID VGTURB_ACT and simulation item VGTURB_DSD using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) •  Operate the variable turbine geometry turbocharger actuator using the simulation item VGTURB_DSD. •  Does PID VGTURB_ACT change according to the simulation operation.	Yes	Go to Step 7.
		No	Go to the next step.
5	INSPECT VARIABLE TURBINE GEOMETRY TURBOCHARGER ACTUATOR •  Inspect the variable turbine geometry turbocharger actuator. (See VARIABLE TURBINE GEOMETRY TURBOCHARGER ACTUATOR INSPECTION [SKYACTIV-D 2.2].) •  Is the variable turbine geometry turbocharger actuator normal?	Yes	Go to the next step.
		No	Replace the variable turbine geometry turbocharger actuator, then go to the next step. (See TURBOCHARGER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
6	DETERMINE IF MALFUNCTION IS CAUSED BY TURBOCHARGER •  Switch the ignition OFF. •  Switch the ignition ON (engine on). •  Display PID VGTURB_ACT and simulation item VGTURB_DSD using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) •  Operate the turbocharger with variable geometry using the simulation item VGTURB_DSD. •  Does PID VGTURB_ACT change according to the simulation operation.	Yes	Go to the next step.
		No	Replace the turbocharger with variable turbine geometry, then go to the next step. (See TURBOCHARGER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
7	INSPECT MAP SENSOR •  Reconnect all the disconnected connectors. •  Inspect the MAP sensor. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION [SKYACTIV-D 2.2].) •  Is the MAP sensor normal?	Yes	Go to the next step.
		No	Replace the MAP sensor, then go to the next step. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
8	INSPECT EXHAUST GAS PRESSURE SENSOR •  Reconnect all the disconnected connectors. •  Inspect exhaust gas pressure sensor No.1. (See EXHAUST GAS PRESSURE SENSOR INSPECTION [SKYACTIV-D 2.2].) •  Is exhaust gas pressure sensor No.1 normal?	Yes	Replace the variable turbine geometry turbocharger actuator, then go to the next step. (See TURBOCHARGER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
		No	Replace exhaust gas pressure sensor No.1, then go to the next step. (See EXHAUST GAS PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
9	PERFORM COMPULSORY diesel particulate filter REGENERATION AND BURN OUT ENGINE OIL IN diesel particulate filter •  Perform compulsory diesel particulate filter regeneration. (See COMPULSORY DIESEL PARTICULATE FILTER REGENERATION [SKYACTIV-D 2.2].) Note •  When a DTC is stored, compulsory diesel particulate filter regeneration may be restricted by the PCM control. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) ―  When a high quantity of soot has accumulated in the diesel particulate filter and the PCM has stored DTC P242F:00, compulsory diesel particulate filter regeneration cannot be implemented. •  Perform applicable DTC troubleshooting then perform compulsory diesel particulate filter regeneration. (See DTC TABLE [PCM (SKYACTIV-D 2.2)].)	―	Go to the next step.
10	VERIFY ENGINE OIL LEVEL •  Verify the engine oil level. (See ENGINE OIL LEVEL INSPECTION [SKYACTIV-D 2.2]) •  Is the oil level above the X on the gauge?	Yes	Replace the engine oil. (See ENGINE OIL REPLACEMENT [SKYACTIV-D 2.2]) Implement the engine oil data reset procedure. (See ENGINE OIL DATA RESET [SKYACTIV-D 2.2].) Go to the next step.
		No	Go to the next step.
11	VERIFY THAT REPAIRS HAVE BEEN COMPLETED •  Reconnect all disconnected connectors and hoses. •  Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC. Clear the DTC. (See CLEARING DTC [PCM (SKYACTIV-D 2.2)].) •  Start the engine and drive the vehicle under the freeze frame data/snapshot data condition. Warning •  To prevent an accident, work with another person when the vehicle is being driven (one person drives vehicle, other person operates M-MDS). •  Observe legal speed limits when driving the vehicle and perform the procedure in a location where safety can be assured. •  Display the DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) •  Has DTC P1142:00 been recorded?	Yes	Repeat the inspection from Step 1. •  If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
		No	Go to the next step.
12	VERIFY OTHER DTCs •  Has any other DTC or pending code been stored?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
		No	Referring to each adjustment procedure, perform fuel injection amount learning and the diesel particulate filter data reset. (See FUEL INJECTOR INJECTION AMOUNT CORRECTION [SKYACTIV-D 2.2].) (See DIESEL PARTICULATE FILTER DATA RESET [SKYACTIV-D 2.2].) DTC troubleshooting completed.