P0128 after AC Recharge?

[APBRiM]

So I've been getting this code (taking to long to warm up?) after I got my AC charged. I don't know how they're even connected but I wasn't getting it before. AC was completely empty, got a full charge and now it's blowing cold.

It does seem to be running a little cooler when I'm driving it, a little under 190F. I tried to turn it on, let it sit and watch the temps, but never got the code. Only get it if I start driving while it warms up. At idle the clutch fan runs constantly, the electric fan stays off.

Just a coincidence about the AC maybe? The entire cooling system is new, under 1K miles. New pump, thermostat, fan, hoses, radiator, etc. The whole kit from FCP.

[HDdave]

It’s a temp sensor behind the water pump housing... Mine was doing it as well. I changed mine when I did my whole cooling system.. I think you can get to it with just the intake manifold off

[Arith2]

Read what the car says through OBD before you start it. Compare it to ambient considering it should match. It takes about 6 hours for the block to fully cool. That'll start to help diagnose the electric sensor.

[APBRiM]

I'll double check, but I'm pretty sure the temps were responding. I had it hooked up to inpa while idling in the garage.

I don't get the code if I let it idle up to temp, only if I start it up and go driving.

[HighSchoolDream]

So was it just a bad sensor? My car just popped the same code, read on my cheapo obd reader. Was gonna clear it but wasn’t sure if a better reader might be able to see more

[OEMaddict]

Lol my car had this code pop up too last week... recently had a cooling refresh too.