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Old 04-28-2012, 04:32 PM   #1
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Default 97 sl2 poor gas mileage

97 sl2 poor gas mileage. I got a code po141 and replaced the cat- conv. O2 sensor. The sensor was black with carbon. Are there problems related??? Or is the car running that rich???
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Old 04-28-2012, 09:34 PM   #2
97sl2DOHCaut1.9 is on a distinguished road
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Default Re: 97 sl2 poor gas mileage

Describe what the code is ...
I have a 97 sl2 as well and gas mileage problems can be a lot of things, most likely being a bad ECTS and connector. What does your temp gauge read? It should be at 3/8ths. Do you live in CA?
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Old 04-29-2012, 01:02 AM   #3
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1997 SL2
Default Re: 97 sl2 poor gas mileage -- O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)

to expand on 97sl2DOHCaut1.9's post, after replacing the ECTS/connector, if it still (and mostly likely) hangs at 1/4 on the temp gauge, replace the thermostat. You want the Stant 14279 or the Napa equivalent.
97 SL2
DOB: 3/19/97
Date Obtained: 5/30/07
Status: Alive, 1/2 exhaust

2004 Merc G.Marquis GS
DOB: 2/4/04
Date Obtained: 7/6/12
Status: Alive, no heat
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