No. 15 Emission Compliance: Notes

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

SYMPTOM CHART (EMISSION COMPLIANCE)

15	EMISSION COMPLIANCE
DESCRIPTION	Fails emissions test.
POSSIBLE CAUSE	Electrical connector disconnection Intake air system and air cleaner element malfunction Vacuum lines leakage or blockage PCM DTC is stored. Cooling system malfunction Fuel-filler cap malfunction A/F sensor malfunction Ignition system improper operation Spark plug malfunction Ignition coil malfunction Ignition coil related wiring harness malfunction Erratic or no signal from CMP sensor Excessive or insufficient fuel pressure Fuel pump relay or fuel pump circuit malfunction Restriction in fuel tine Pressure regulator malfunction (built-into fuel pump unit) Fuel pump malfunction Charcoal canister malfunction Exhaust system clogging TWC malfunction EGR system malfunction Base engine malfunction Improper engine compression Improper valve timing PCV valve malfunction 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. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION .) (See AFTER SERVICE PRECAUTION .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and the 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

Electrical connector disconnection
Intake air system and air cleaner element malfunction
Vacuum lines leakage or blockage
PCM DTC is stored.
Cooling system malfunction
Fuel-filler cap malfunction
A/F sensor malfunction
Ignition system improper operation
- Spark plug malfunction
- Ignition coil malfunction
- Ignition coil related wiring harness malfunction
Erratic or no signal from CMP sensor
Excessive or insufficient fuel pressure
- Fuel pump relay or fuel pump circuit malfunction
- Restriction in fuel tine
- Pressure regulator malfunction (built-into fuel pump unit)
- Fuel pump malfunction
Charcoal canister malfunction
Exhaust system clogging
TWC malfunction
EGR system malfunction
Base engine malfunction
Improper engine compression
Improper valve timing
PCV valve malfunction

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.
Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION .) (See AFTER SERVICE PRECAUTION .)

CAUTION:

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