Is Check Engine Light Covered Under Warranty?

Under federal law, manufacturers must provide an eight year/80,000 mile warranty for defects in catalytic converters and other components of the emissions control system. If your amber check-engine light comes on, you probably have an emissions control problem covered by your warranty.

Does a car warranty cover check engine light?

A failure of the engine light covers only part of the powertrain or emissions warranty; it also covers only part of an emission warranty. There would be a fee if the failure of this part had no relevance to the bumper to bumper warranty.

Is diagnosis covered under warranty?

Re: diagnostic fee for car under warranty? Yes, that is standard. If they cannot find anything wrong, then they cannot get reimbursed from the manufacturer. Since someone has to pay, you pay.