No. 15 - Emission Compliance: Notes
NO. 15 EMISSION COMPLIANCE DESCRIPTION AND POSSIBLE CAUSE
| 15 |
EMISSION COMPLIANCE |
| DESCRIPTION |
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| 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.
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