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Old 11-12-2005, 05:07 AM   #1
kjtar
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What is this part? CEL stays on

Daughter took the car in and 2 out of 3 things were fixed. Clutch master cylinder installed so no more brake fluid leaking inside the car. Antifreeze leak fixed by replacing thermostat housing (but they had a hard time getting the "right" housing). Still needs to be done, CEL light came on and stayed on but when they cleaned this part (link to image is below) it went off. But then it came back on again, so we'd like to get a new one and install it. Please go to the URL below and then scroll down to the bottom of that page to see the part and help me and "Daught" get a good one. Here's the URL, just scroll down to the bottom of the page:
http://www.tomandkarenspage.com/cars
Additional information; today "Daught" went to AutoZone and had the CEL code read. Although she didn't get the actual code, she was told that it was the "oxygen sensor preheat" and of course what we're wondering now is if the pictured part is the code described part. Can anyone help?

Thanks,
Tom



Last edited by kjtar; 11-12-2005 at 07:03 PM.
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Old 11-12-2005, 08:10 PM   #2
Scott_SVT
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thats your coolant temp sender.... it has nothing to do with an 02 sensor code...
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Old 11-13-2005, 03:37 AM   #3
kjtar
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What is this part? CEL light still on: OBDII codes

Quote:
Originally posted by Scott_SVT
thats your coolant temp sender.... it has nothing to do with an 02 sensor code...
Hi Scott,
Thanks for id-ing the part. When you say it has nothing to do with an O2 sensor code you're right There are coolant related codes;
(see http://www.tomandkarenspage.com/cars/obd2.html), but as the shop said that the coolant temp sender was corroded (they said they cleaned it off) we might as well get a new one, then if the CEL light stays on we'll investigate the p/n for the proper O2 sensor, and this time get the code number.
Rgds,
Tom
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Old 11-13-2005, 06:33 PM   #4
kjtar
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Got code: P0141: what part # do I need?

Went to AutoZone today and got the code read, and this time got a code number: P0141. which has a description of "O2 Sensor Heater Circuit". Okay, I don't have a Chilton or Haynes or Ford manual which would, I guess, actually tell me what that means. What part do I need to get to cancel the CEL? And, I would take it then that the coolant temperature sensor is NOT the culprit in this case?
(2002 Ford Focus SVT, U.S. spec)
Thanks,
Tom (and daughter Cristy)
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Old 11-13-2005, 07:25 PM   #5
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Ok... P0141 is the downstrean O2 sensor heater circuit malfunctioning... so either the wire is chafed or the o2 is bad... (or the comp is toast... but that isn't likely)

Do a quick check of the harness leading to the 02 (the one AFTER the cat) to see if a wire got pinched or chafed... if not... probably best to just toss in a new 02 sensor.
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Old 11-14-2005, 12:14 AM   #6
kjtar
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Code P0141 = downstream O2 sensor, probably

Excellent, thanks Scott. Will have "Daught" bring in the car just to make sure the harness is okay before ordering the part. I have a price from Steve on it, ($58.34), I'll call and check his shipping and if it's still in stock at his place. BTW, p/n is F8RZ-0G444-BB.
Best,
Tom
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