Been getting error codes not check engine light and error codes do not show up on diagnostic tool from Mechanic. Those codes do not come on all the time either.
I came here looking for an answer for this same issue. A couple of years ago Sync showed me a trouble code. I took the car into the dealer, they said their machine showed no active or stored trouble codes. … Earlier this week Sync sent me a trouble code that said “Coolant Thermostat Malfunction” “Coolant Thermostat failed, replace” but there were no warning lights on the dash and the gages looked fine. … I took it to the dealer and was told that their machine didn’t see any active or stored trouble codes but they replaced the thermostat anyway because it’s covered under the warranty and would rather be safe than sorry. (Guessing since I showed them that code had popped up and they didn’t replace it then the engine overheated and had to be replaced they’d be liable?) On my way home from the dealer, the same code popped up. Still no warning lights on the dash, gages still look fine. … AND I missed a wedding I was planning to drive across country for due to the car being in the shop when it might not have even needed to be.
Posted elsewhere also
Bad experience with SyncUp-Drive -- Worked satisfactorily for 5 months. (A couple of modest issues, like not being able to clear old trips. Want only 7 days, erase older.) MAJOR issue started in August with FOUR Engine status codes. Took car to shop. They confirmed the same codes with Professional Diagnostic Tool. Afterwards, reinserted Sync-up Drive. Never was recognized. Most recent info (car location) shows still at repair shop. Still shows the 4 error codes. Lacks detailed instructions for users who like to dig into the weeds. TMobile (corporate) Store personal tried to help, discovered internal doct revieling a reset pin. Tried that, no joy.
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