Five problems related to check engine light on have been reported for the 2012 GMC Terrain. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 GMC Terrain based on all problems reported for the 2012 Terrain.
The check engine lights continually comes one and off. At first, when my husband turned on the truck and saw the check engine light we took it in and the error was for 1 coil pack. It was fine for a month, then after starting the truck again the check engine light came on, and we replaced all of the coil packs. Now when we start the truck, the check engine light may be on or off. At least once a week, when we start the truck the check engine light will be on. This issue has been reoccurring and has been going on for close to a year. The last 5 or 6 times we had it put on the machine there have been no errors found and our mechanic's baffled. Especially since the truck may stutter or become sluggish or shut off like before whenever the check engine light comes back on. If something is wrong with our vehicle but no errors are found we have no clue if there is truly something occurring and if it's causing serious damage and harm to our family. Our vehicle was manufactured in canada and we aren't sure if there could be issues being reported in canada that we don't know about. In addition, there are recalls that we weren't notified of but nothing pertaining to this issue.
Engine stalls when at low idle while reducing speed I. E. , at stop light. Will immediately restart and stall when placed into drive or reverse. Hade camshaft position sensor intake replaced. Stalling resumed within two weeks and now check engine light is on.
Vehicle was started after sitting in a parking lot for 8 hours while I was at work. Season was winter. Vehicle noted to be running rough, barely driveable, check engine light on.
Car die (stall) at idol after warmed up drive it 10 miles stop at stop sign it die restart die again may do that 3-4 times before it will take gas and run does this intermeditly run fine for half a day stop run in store come out restart and it die (no chugging just die) auto parts store said it was a crankshaft sensor when they checked what had the check engine light on (note check engine light not come on each time it stalls).
Tl * the contact owns a 2012 GMC Terrain. The contact was driving 5 mph when the vehicle stalled and the check engine light illuminated. The vehicle was not taken to the dealer and the manufacturer was not made aware of the failure. The vehicle was not repaired. The failure and the current mileage was 3,600.