Porsche Club GB

Temp gauge

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3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

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YOUR RESEARCHTemp gauge

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output

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Suspected cause
If it was the output to the DME you would have got a flashing light in the temp gauge.
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Temp gauge

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Leading evidence: 'output' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'output' (1 discussions; 0 report identifying it and 1 suggest it). No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Reported and suspected causes (1)

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output

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

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Discussions that suspect a cause: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause
If it was the output to the DME you would have got a flashing light in the temp gauge.
Original post Read captured discussion
Temp gauge

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3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Porsche Club GB: 1 discussions

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Generation: 20261027T173940Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I am after a bit of advice please before I contact the garage. Driving my C2 on Sunday I noticed that the temperature gauge was creeping up to the 90 degree mark. As it was a cold day and I hadn't been sitting in traffic this was unusual. When I got home the gauge had climbed higher, to about 100 degrees, however the engine definitely wasn't running hot. I turned the engine off and the gauge stuck at about 90 degrees rather than returning to 'zero' as it normally would. I turned the ignition on again and the gauge went up to almost 120 degrees before jumping around a bit, then when I turned the engine off it again stuck at about the mid-point. I am thinking that this could be the thermostat or sender unit? If so how much should I expect it to cost to replace? Thanks.

POST 2Original post

Sounds more like the temperature sensor to me. The sensor (for a 3.4L) is £15.63+VAT, and 1/2 hor book time to change. (Plus coolant top up). There are two outputs from the sensor - one for the DME, and one for the gauge, and it sounds like the gauge part is faulty. If it was the output to the DME you would have got a flashing light in the temp gauge. A diagnostic check would show if the DME signal is the same as the guage reading, and if it isn't then it will definitely be the sensor. If it is the thermostat, they are £31.97+VAT, and 1 hour book time, plus coolant refill/bleed. All Porsche prices and times.

POST 3 / ORIGINAL POSTEROriginal post

Thanks very much for the quick and comprehensive reply Richard. I like to know what I am looking at before taking the car in!!

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