Joined
·
38 Posts
Short story:
Steady overheat message on MFI even when engine is cold, cooling fans run on high during and after engine is turned off, then stop after 5-10 minutes.
Long story:
The thermostat does not close completely (probably not related to the problem though), never bothered me in city driving, engine always at normal 200F or so. I was on a freeway for a while, temperature around 160F which is expected with leaking thermostat. Suddenly overheat message came on. I took a look at temperature gauge - strait up at 200F. Probably jumped from 160 to 200 in an instant because I was pretty much closely watching it. Pulled over on a nearest service plaza, radiator hoses are lukewarm, engine is not very hot on touch when I reached metal parts. Fans running in after run mode on highest speed. Waited for some time with "rest" heater on just in case. Fans eventually stopped, I started driving with temperature gauge around 150F. Shortly after got stuck in traffic at 5km/h for a half an hour, temperature quickly reached 200 and stayed there. Later, at normal speed temperature reached 160 again (thanks faulty thermostat) and after about 10-20 minutes the same overheat signal on MFI and temperature immediately at 200F. This time I did not stop and reached my destination. The false overheat condition seems permanent now.
Initial investigation:
I found two two wire temperature sensors (06A-919-501): G62 on engine and G83 on a radiator but according to other posts there is a three wire dual thermo-switch 1J0-959-481-A located somewhere at radiator.
Any suggestions and/or comments?
Steady overheat message on MFI even when engine is cold, cooling fans run on high during and after engine is turned off, then stop after 5-10 minutes.
Long story:
The thermostat does not close completely (probably not related to the problem though), never bothered me in city driving, engine always at normal 200F or so. I was on a freeway for a while, temperature around 160F which is expected with leaking thermostat. Suddenly overheat message came on. I took a look at temperature gauge - strait up at 200F. Probably jumped from 160 to 200 in an instant because I was pretty much closely watching it. Pulled over on a nearest service plaza, radiator hoses are lukewarm, engine is not very hot on touch when I reached metal parts. Fans running in after run mode on highest speed. Waited for some time with "rest" heater on just in case. Fans eventually stopped, I started driving with temperature gauge around 150F. Shortly after got stuck in traffic at 5km/h for a half an hour, temperature quickly reached 200 and stayed there. Later, at normal speed temperature reached 160 again (thanks faulty thermostat) and after about 10-20 minutes the same overheat signal on MFI and temperature immediately at 200F. This time I did not stop and reached my destination. The false overheat condition seems permanent now.
Initial investigation:
I found two two wire temperature sensors (06A-919-501): G62 on engine and G83 on a radiator but according to other posts there is a three wire dual thermo-switch 1J0-959-481-A located somewhere at radiator.
Any suggestions and/or comments?