Jump to content
Ultimate Subaru Message Board

Coolant Temp Sensor Q


Recommended Posts

Had a strange problem pop up today; '88 turbowagon- running great, I pull in for gas, fill tank, jump back in, no start.

Cranks over, spark is good, (plus new cap and rotor) -finally after 20 min it started, but runs very rough now. Check engine light on intermittant; fault code 21- which I believe is coolant temp sensor.

Anyone seen a bad temp sensor cause rough idle like this?

Link to comment
Share on other sites

yes, it keeps the car from running aggressively enough to run very hot, since the sensor doesn't promise that it can tell the computer how hot the engine is. check the wiring pigtail on top of the sensor (inserts to the manifold vertically, near the PCV valve. i think the wires are green and white on my '86)

i've had the code come up from a sloppy wiring repair i did, improving the repair fixed the code. it could be the sensor itself as well of course.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...