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Re: further to recent post on coolant issues Posted by Justin VanAbrahams [Email]  (#32) [Profile/Gallery]
(more from Justin VanAbrahams) on Mon, 29 Jan 2018 13:12:02
In Reply to: further to recent post on coolant issues, Saabu  [Profile/Gallery]
, Mon, 29 Jan 2018 12:39:45
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Any OBDII tool can read the ECT sensor - but, you want to be sure you get a tool that will show live data and not just check engine codes. Not all readers will show live data - especially the cheaper ones.
Two readers I like are:
Autel: https://www.amazon.com/gp/product/B007XE8C74/ref=as_li_tf_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B007XE8C74&linkCode=as2&tag=thesaabnetwork
Innova: https://www.amazon.com/gp/product/B009JCU1ZO/ref=as_li_tf_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B009JCU1ZO&linkCode=as2&tag=thesaabnetwork
Opposite ends of the spectrum, but both solid options.
Of course, for around $250 you can just buy a clone Tech 2 which you may just wanna have for a 9-3. Saves a LOT of money and trouble in the long run.
If the system detects a problem with the ECT sensor it may switch to failsafe mode and run the high speed fan full time. The gauge reading zero would be indicative of such a problem. It's also possible but less likely that you have a stuck open thermostat that, in cold weather, presents a similar illusion - the engine temp is so low that the ECM suspects the ECT sensor faulty. Same thing could happen in other circumstances - low coolant, bad water pump, etc.
You need to get a scan tool on that thing ASAP to determine what the ECT sensor says, and whether you have a sensor issue or a greater cooling system issue. I think you mentioned poor heater output, and that suggests that engine temps are indeed low and it's not (just) an ECT sensor issue. Personally, I would not be driving this car until you get it sorted out. A cooling system problem can quickly become an engine rebuild problem.
posted by 12.195.130...
, Mon, 29 Jan 2018 12:39:45, Mon, 29 Jan 2018 13:12:02 <-- Viewing This Message, Sat, 3 Feb 2018 14:06:09, Mon, 29 Jan 2018 18:54:17, Mon, 29 Jan 2018 21:52:53
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