Intention of troubleshooting procedure

WARNING: This page is about a different variant/trim than selected.

Step 1-3
- Perform a fuel injector control system inspection.
Step 4
- Perform an emission system parts inspection.
Step 5-7
- Perform an intake air system parts inspection.
Step 8-11
- Perform a valve timing inspection.
Step 12
- Perform an exhaust system parts inspection.
Repair completion verification
- Verify that the primary malfunction is resolved and there are no other malfunctions.

P0172-00 (PCM (PYUL)) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	PURPOSE: VERIFY FUEL PUMP CONTROL MODULE FOR MALFUNCTION Inspect the applicable part. (Refer to [FUEL PUMP CONTROL MODULE INSPECTION ] in Service Information). Is the part normal?	Yes	Go to the next step.
1		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [FUEL PUMP CONTROL MODULE REMOVAL/INSTALLATION ] in Service Information).
2	PURPOSE: VERIFY FUEL PUMP UNIT FOR MALFUNCTION Inspect the applicable part. (Refer to [FUEL PUMP UNIT INSPECTION ] in Service Information). Is the part normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [FUEL PUMP UNIT REMOVAL/INSTALLATION ] in Service Information).
3	PURPOSE: VERIFY FUEL INJECTOR FOR MALFUNCTION Inspect the applicable part. (Refer to [FUEL INJECTOR INSPECTION ] in Service Information). Is the part normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [FUEL INJECTOR REMOVAL/INSTALLATION ] in Service Information).
4	PURPOSE: VERIFY PURGE SOLENOID VALVE FOR MALFUNCTION Inspect the applicable part. (Refer to [PURGE SOLENOID VALVE INSPECTION ] in Service Information). Is the part normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [PURGE SOLENOID VALVE REMOVAL/INSTALLATION ] in Service Information).
5	PURPOSE: VERIFY MAF SENSOR FOR MALFUNCTION Inspect the applicable part. (Refer to [MASS AIR FLOW (MAF) SENSOR INSPECTION ] in Service Information). Is the part normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 1 REMOVAL/INSTALLATION ] in Service Information).
6	PURPOSE: VERIFY AIR CLEANER FOR MALFUNCTION Remove the air cleaner element with the engine is idling. (Refer to [AIR CLEANER ELEMENT REMOVAL/INSTALLATION ] in Service Information). Does the engine speed increase?	Yes	Inspect the air cleaner element. (Refer to [AIR CLEANER ELEMENT INSPECTION ] in Service Information). If there is any malfunction: Clean or replace the air cleaner element and perform the repair completion verification (Refer to [AIR CLEANER ELEMENT REMOVAL/INSTALLATION ] in Service Information). If there is no malfunction: Go to the next step.
6		No	Go to the next step.
7	PURPOSE: VERIFY MAP SENSOR FOR MALFUNCTION Inspect the applicable part. (Refer to [MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION ] in Service Information). Is the part normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 2 REMOVAL/INSTALLATION ] in Service Information).
8	PURPOSE: VERIFY ELECTRIC VARIABLE VALVE TIMING DRIVER FOR MALFUNCTION Inspect the applicable part. (Refer to [ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION ] in Service Information). Is the part normal?	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION ] in Service Information).
9	PURPOSE: VERIFY ELECTRIC VARIABLE VALVE TIMING MOTOR FOR MALFUNCTION Inspect the applicable part. (Refer to [ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION ] in Service Information). Is the part normal?	Yes	Go to the next step.
9		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION ] in Service Information).
10	PURPOSE: VERIFY ELECTRIC VARIABLE VALVE TIMING ACTUATOR FOR MALFUNCTION Inspect the applicable part. (Refer to [ELECTRIC VARIABLE VALVE TIMING ACTUATOR INSPECTION ] in Service Information). Is the part normal?	Yes	Go to the next step.
10		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [ELECTRIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION ] in Service Information).
11	PURPOSE: VERIFY OIL CONTROL VALVE (OCV) FOR MALFUNCTION Inspect the applicable part. (Refer to [HYDRAULIC VARIABLE VALVE TIMING ACTUATOR INSPECTION ] in Service Information). Is the part normal?	Yes	Go to the next step.
11		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION ] in Service Information).
12	PURPOSE: VERIFY A/F SENSOR FOR MALFUNCTION Inspect the applicable part. (Refer to [AIR FUEL RATIO (A/F) SENSOR INSPECTION ] in Service Information). Is the part normal?	Yes	Go to the next step.
12		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION ] in Service Information).
Repair completion verification 1	PURPOSE: VERIFY THAT VEHICLE IS REPAIRED Install/connect the part removed/disconnected during the troubleshooting procedure. Clear the DTC recorded in the memory. (See CLEARING DTC ) Replicate the vehicle conditions at the time the DTC was detected using the following procedure. Implement the repeatability verification procedure. (See Repeatability Verification Procedure ) Perform the DTC inspection for the PCM. (See DTC INSPECTION ) Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] ) If the CAN communication is normal, perform the diagnosis from Step 1. If the malfunction recurs, replace the PCM. (Refer to [PCM REMOVAL/INSTALLATION ] in Service Information).
Repair completion verification 1		No	DTC troubleshooting completed.