My daughter's 05 GV (2.5L auto) had a P0128 DTC this morning. I monitored live data and the coolant seemed slow to warm up, but not terribly slow. Coolant bottle is full. Heater is hot.
She drives about 1 mile to work, and rarely drives otherwise. I've told her she needs to warm up the car more frequently, drive longer distances occasionally, but... You know how that goes. Dad-advice goes in one ear, and out the other.
After looking at FF data, today I cleared the codes and drove it vigorously for a few miles and fully warmed up the car. No codes currently, pending or active.
Here's a photo of her instrument panel:
![Image]()
Is this the proper position for the coolant temp gauge, when the car is fully warmed up?
I read that the usual suspects are low coolant, stuck thermostat, and faulty intake air temp sensor. It's acting like the thermostat might be stuck partially open. I also know from this forum that the ECT sensor and the dash coolant temp gauge are on two separate sensors.
My plan is to check the t-stat housing with a laser gun to check actual temps. My thoughts today are that she should fully warm up the car and drive it a while, to see if and when the DTC returns.
Anyone have any thoughts?
She drives about 1 mile to work, and rarely drives otherwise. I've told her she needs to warm up the car more frequently, drive longer distances occasionally, but... You know how that goes. Dad-advice goes in one ear, and out the other.
After looking at FF data, today I cleared the codes and drove it vigorously for a few miles and fully warmed up the car. No codes currently, pending or active.
Here's a photo of her instrument panel:
Is this the proper position for the coolant temp gauge, when the car is fully warmed up?
I read that the usual suspects are low coolant, stuck thermostat, and faulty intake air temp sensor. It's acting like the thermostat might be stuck partially open. I also know from this forum that the ECT sensor and the dash coolant temp gauge are on two separate sensors.
My plan is to check the t-stat housing with a laser gun to check actual temps. My thoughts today are that she should fully warm up the car and drive it a while, to see if and when the DTC returns.
Anyone have any thoughts?
