Hi. Any advice on this one would be appreciated:
'05 LS V8 134k miles
Last summer I replaced the thermostat and housing, and other plastic parts of the cooling system that had failed or might fail. Car has run fine since then, but...
The last couple of months, occasionally, after my 20 mile commute home, if I stop at the store and do a quick pick-up, when I turn the car on again, I get a "check engine temp" warning. The dash temp gauge will show very high heat, but it starts falling right away, and is back to a normal reading after 20-30 seconds.
Yesterday, under the same conditions, I got the high temp warning again, but the temp gauge didn't fall as it had before. Waited 30 seconds and no change. Turned the ignition off and then on again and got a normal temp reading.
I'm thinking that it might be a failing sensor rather than a mechanical issue. Has anyone had a similar problem?
On a possibly-connected note a similar thing has sometimes happened to my external temp reading. Last winter, it would sometimes show the ext. temp as 70 before falling to the real temp of 30.
Makes me wonder if there's possibly a computer issue, or is it just time to replace both thermometers, both external and coolant sensor?
What do you think? Thanks for any advice you can give.
'05 LS V8 134k miles
Last summer I replaced the thermostat and housing, and other plastic parts of the cooling system that had failed or might fail. Car has run fine since then, but...
The last couple of months, occasionally, after my 20 mile commute home, if I stop at the store and do a quick pick-up, when I turn the car on again, I get a "check engine temp" warning. The dash temp gauge will show very high heat, but it starts falling right away, and is back to a normal reading after 20-30 seconds.
Yesterday, under the same conditions, I got the high temp warning again, but the temp gauge didn't fall as it had before. Waited 30 seconds and no change. Turned the ignition off and then on again and got a normal temp reading.
I'm thinking that it might be a failing sensor rather than a mechanical issue. Has anyone had a similar problem?
On a possibly-connected note a similar thing has sometimes happened to my external temp reading. Last winter, it would sometimes show the ext. temp as 70 before falling to the real temp of 30.
Makes me wonder if there's possibly a computer issue, or is it just time to replace both thermometers, both external and coolant sensor?
What do you think? Thanks for any advice you can give.
