# False temperature - Dodge Neon

**URL:** <https://community.cartalk.com/t/false-temperature-dodge-neon/8265>\
**Category:** Maintenance/Repairs\
**Tags:** overheating\
**Created:** [December 12, 2007, 5:36pm UTC](https://community.cartalk.com/t/false-temperature-dodge-neon/8265 "2007-12-12T17:36:34Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![keredye](https://avatars.discourse-cdn.com/v4/letter/k/47e85d/32.png) [@keredye](https://community.cartalk.com/u/keredye)\
**Post date:** [December 12, 2007, 5:36pm UTC](https://community.cartalk.com/t/false-temperature-dodge-neon/8265/1 "2007-12-12T17:36:34Z")

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Have a 2000 Dodge Neon with 84,000. Because I live close to work, it is driven 4-5 times week (low miles). Recently, the temperature gauge did not move, then jumps to hot, then back to low. On occasion, it goes to the correct temperature. My mechanic ran diagnostics and pressure check. Pressure check was okay. Diagnostic showed something, but when that part was replaced, the problem continued so the old part was put back in. Any suggestions?

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**Author:** ![SteveF](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/stevef/32/2_2.png) [@SteveF](https://community.cartalk.com/u/SteveF)\
**Post date:** [December 12, 2007, 7:14pm UTC](https://community.cartalk.com/t/false-temperature-dodge-neon/8265/2 "2007-12-12T19:14:29Z")

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It would help us if you told us the part he replaced, then removed. If it was not the temperature sending unit, then that’s the part you need to replace now.

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**Author:** ![keredye](https://avatars.discourse-cdn.com/v4/letter/k/47e85d/32.png) [@keredye](https://community.cartalk.com/u/keredye)\
**Post date:** [December 13, 2007, 8:15pm UTC](https://community.cartalk.com/t/false-temperature-dodge-neon/8265/3 "2007-12-13T20:15:02Z")

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ECT sensor was replaced.

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**Author:** ![davidlarsen](https://avatars.discourse-cdn.com/v4/letter/d/54ee81/32.png) [@davidlarsen](https://community.cartalk.com/u/davidlarsen)\
**Post date:** [December 14, 2007, 2:23am UTC](https://community.cartalk.com/t/false-temperature-dodge-neon/8265/4 "2007-12-14T02:23:14Z")

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Don’t remember which car it was, but had the same problem. New thermostat fixed it.

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**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\
**Post date:** [December 14, 2007, 4:25am UTC](https://community.cartalk.com/t/false-temperature-dodge-neon/8265/5 "2007-12-14T04:25:02Z")

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The wiring diagrams from the ARRC (Auto Repair Reference Center) web site (through the local public library) shows a violet/yellow wire from the temperature gage to the #59 terminal, called the PCI bus, on the PCM (Powertrain Control Module), aka engine computer. Power to the gage comes from a fuse on a dark blue/white wire. There could be a problem in either wire, or, their terminals.