We have a 2018 Ford Escape that recently had a full transmission rebuild. The Check Engine light recently went on and after some digging, we found the Coolant Sensor was causing the Check Engine light to come on. After adding coolant fluid, the light is now off. Do you think we still need to get the sensor fixed? We don’t want to pay for a new engine after the transmission so just curious what the best approach is, thanks!
What the other commenter said it probably correct. “Low engine coolant can alter the engine running temperature enough to signal trouble code P0128. Your intake air temperature sensor, coolant temperature sensor and coolant fan could also signal this trouble code, so these should be inspected after you look over your thermostat and coolant level.” Check engine didn’t necessarily meant the sensor was bad, might have just needed the coolant. Keep an eye on the coolant level for a while as the low coolant might indicate a leak somewhere.