This may have been covered. So here it is.Put new snow tires on last night,and check engine light came on. IN THE Owners manaul is says it could come on. Is there any risk to ignoring this. Will put all seasons back on in spring. We have 110'' of snow already and the all seasons did not cut it. used same size tire. Any thoughts.thanx in advance
ANDY

 

The CEL should have nothing to do with your snow tires.

 

is it possible the TPMS could set this off?

 

Not that I am aware of. ECM doesn't care what tire pressures are.

 

any chance that lack of pressure sensors would set it off?

 

No, but the TPS light would be on.

 

Did you put gas in the car yesterday? Cap might be loose.

 

PAGE 3-36 OWNERS MANUAL Modifcations made to the engine,transaxle,exhaust,intake, or fuel system of your vechicle or the replacement of the orginal tires with other than those of the same Tire Performance Criteria [TPC] can affect your vechicle's emission controls and may cause this light to come on ...

 

Andy... which Check Engine Light is on?

Is it the horseshoe shaped one with the dots in the middle? If so that's not a check engine light, it's the tire pressure monitor. Perhaps your new snow tires didn't have the pressure monitors in them?

When I bought my snow tires I didn't purchase the TPMs so I have to deal with a yellow light on the dash while I drive. Worth it to be able to get around safely in the snow.

 

iTS THE ONE THAT LOOKS LIKE A LITTLE ENGINE