NO. 15 Emission Compliance: Notes

NO. 15 EMISSION COMPLIANCE (SKYACTIV-G 2.5T) DESCRIPTION AND POSSIBLE CAUSE

15	EMISSION COMPLIANCE
DESCRIPTION	Fails emissions test.
POSSIBLE CAUSE	Engine overheating Cooling system malfunction PCM DTC is stored Incorrect fuel injection timing Incorrect ignition timing Spark plug malfunction Ignition coil malfunction Crankshaft position (CKP) sensor malfunction Camshaft position (CMP) sensor malfunction Purge solenoid valve malfunction Ejector malfunction Inadequate fuel pressure Fuel leakage at the fuel line and/or fuel injector Fuel pressure sensor or related circuit malfunction High pressure fuel pump malfunction Spill valve control solenoid valve control circuit malfunction (damage to driver in PCM caused by short circuit to ground system) Spill valve control solenoid valve (built-into high pressure fuel pump) malfunction Relief valve (built-into high pressure fuel pump) malfunction Fuel line restriction Fuel pump unit malfunction Fuel pump control module malfunction Air leakage from intake-air system Vacuum lines leakage or blockage Charcoal canister damage Improper engine coolant level Excessive carbon built-up in combustion chamber Improper engine compression Improper intake valve timing Improper exhaust valve timing Exhaust system and/or TWC restriction Exhaust gas leakage from the exhaust system TWC malfunction (PCM DTC is stored.) Positive crankcase ventilation system malfunction PCV valve malfunction or incorrect valve installation Clogging in positive crankcase ventilation system hoses (PCV valve hose, ventilation hose) WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Highly pressurized fuel may spray out if the fuel line is cut. Due to the following dangers occurring with a fuel spray, always complete the "Fuel Line Safety Procedure" to prevent the fuel from spraying. (See Before Service Precaution .) Fuel may cause irritation if it comes in contact with skin and eyes. If fuel ignites and causes a fire, it may lead to serious injury or death, and damage to property and facilities. Fuel is highly flammable and dangerous. Fuel line spills and leakage can cause serious injury or death, and damage to equipment. Always refer to the "Quick Release Connector Removal/Installation (fuel system)" before performing the fuel hose installation, and execute the "Fuel Leakage Inspection" after installation. (See Quick Release Connector Removal/Installation .) (See After Service Precaution .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

EMISSION COMPLIANCE

DESCRIPTION

Fails emissions test.

POSSIBLE CAUSE

Engine overheating
Cooling system malfunction
PCM DTC is stored
Incorrect fuel injection timing
Incorrect ignition timing
- Spark plug malfunction
- Ignition coil malfunction
- Crankshaft position (CKP) sensor malfunction
  - Camshaft position (CMP) sensor malfunction
Purge solenoid valve malfunction
Ejector malfunction
Inadequate fuel pressure
- Fuel leakage at the fuel line and/or fuel injector
- Fuel pressure sensor or related circuit malfunction
- High pressure fuel pump malfunction
- Spill valve control solenoid valve control circuit malfunction (damage to driver in PCM caused by short circuit to ground system)
- Spill valve control solenoid valve (built-into high pressure fuel pump) malfunction
- Relief valve (built-into high pressure fuel pump) malfunction
- Fuel line restriction
- Fuel pump unit malfunction
  - Fuel pump control module malfunction
Air leakage from intake-air system
Vacuum lines leakage or blockage
Charcoal canister damage
Improper engine coolant level
Excessive carbon built-up in combustion chamber
Improper engine compression
Improper intake valve timing
Improper exhaust valve timing
Exhaust system and/or TWC restriction
Exhaust gas leakage from the exhaust system
TWC malfunction (PCM DTC is stored.)
Positive crankcase ventilation system malfunction
- PCV valve malfunction or incorrect valve installation
  - Clogging in positive crankcase ventilation system hoses (PCV valve hose, ventilation hose)

WARNING:

The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
- Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
- Highly pressurized fuel may spray out if the fuel line is cut. Due to the following dangers occurring with a fuel spray, always complete the "Fuel Line Safety Procedure" to prevent the fuel from spraying. (See Before Service Precaution .)
Fuel may cause irritation if it comes in contact with skin and eyes.
- If fuel ignites and causes a fire, it may lead to serious injury or death, and damage to property and facilities.
  - Fuel is highly flammable and dangerous. Fuel line spills and leakage can cause serious injury or death, and damage to equipment. Always refer to the "Quick Release Connector Removal/Installation (fuel system)" before performing the fuel hose installation, and execute the "Fuel Leakage Inspection" after installation. (See Quick Release Connector Removal/Installation .) (See After Service Precaution .)

CAUTION:

Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.