"Check Engine" Light - WARNING
If the "Check Engine" or "Service Engine Soon" light is on, a vehicle WILL NOT pass the inspection. This is an indication of an emission control system problem.
* Your Vehicle Emission Inspection Report (VIR) will list Diagnostic Trouble Codes (DTCs) that indicate the general area of the emission control systems that do not pass inspection. Along with a diagnostic analysis, DTCs help the technician determine what repairs are necessary. Ask for an estimate and understand what work will be performed prior to authorizing repairs. Also ask if the repairs are covered under warranty.
* The check engine light may illuminate indicating something as minor as a loose fuel cap, or a major emission control component failure.
* If a DTC listed on the VIR indicates a fault with the vehicle's "Evaporative System", try tightening the fuel cap until it clicks, then drive the vehicle for a few days to see if the OBD system turns the light off.
* A transmission code is directly related to the emission control system. A vehicle's on-board computer will illuminate the check engine light if a problem with the transmission is detected. A diagnostic analysis will help identify emission-related components that need repair. A transmission malfunction can indeed prevent a vehicle from running efficiently, therefore increasing emissions.
* If the check engine light remains on, you will need to have the problem properly diagnosed and your vehicle repaired prior to retest. The retest is free if you return to the original inspection station within 30 days.
* Make sure to allow ample driving time after repairs for the vehicle to complete it's drive cycle and the OBD computer to become "Ready" for testing (1-2 weeks, including some highway driving).
* Motorists should beware of offers to turn the "Check Engine" light off in an attempt to pass the OBD test without making repairs. If the light has been turned off without making necessary emission-related repairs, it will come back on and the vehicle will not pass the test. The VIR will read "Fail" for being "Not Ready."
* If the "Check Engine" light is flashing , have your vehicle serviced immediately to avoid COSTLY damage of your vehicle's main emission control component - the catalytic converter.
* Contact your vehicle manufacturer or repair technician and inquire about Recalls, manufacturer applied Extended Warranties, and Technical Service Bulletins (TSBs) regarding the emission control system (research by your VIN).
* If emission-related repairs happen to exceed $710, you may qualify for a Repair Waiver. Visit a GCAF Waiver Center for assistance.
Typical Check Engine Warning Indicators
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