Engine Codes - 114, 116, 173, & 177

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NiNeTy Fo SHO

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These are the codes I got. The check engine light came on once or twice and I noticed that my gas mileage starting dropping quite a bit (was averaging about 27-28...now down to about 20 mpg). Another note, the CE came on both times right as the car hit operating temp...leads me to believe an O2.

I am betting I got the 116 code b/c my low coolant light was on...need to fill that back up. Is this safe to assume and check it again later after re-fill of coolant overflow tank?

What would cause the 114? I have read if it is below 50 F outside (which right now it is 28F) that this code will show up. (car was not ran for 12+ hours when codes were taken)

The 173 and 177 I figured are connected and its telling me that I got a bad O2 (makes sense, lots of miles on car, and have never been replaced that I know of, and CE light came on once hitting operating temp). Seems like its telling me that it is the rear O2 sensor, now I get a little confused as to which O2 sensor is in needing of replacement. Care to elaborate on the right or rear O2?


From SHOPhoenixproject.com
114 (O,R) IAT sensor out of range - IAT

116 (O,R) Engine Coolant (ECT) sensor out of range - ECT

173 (R,M) Oxygen sensor not switching - system is or was rich - Single, Right orr Rear HO2S - Fuel control

177 (M) Oxygen sensor not switching - system was rich Left or Front HO2S - Fuel control

Many thanks for any and all help! :thumb:
 

wood_e

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NiNeTy Fo SHO said:
114 (O,R) IAT sensor out of range - IAT

116 (O,R) Engine Coolant (ECT) sensor out of range - ECT

173 (R,M) Oxygen sensor not switching - system is or was rich - Single, Right orr Rear HO2S - Fuel control

177 (M) Oxygen sensor not switching - system was rich Left or Front HO2S - Fuel control

Many thanks for any and all help! :thumb:

Ignore 114 & 116 as you probably didn't warm up your car first & it was probably below 50 out.

Replace both O2 sensors and see if the CE light comes back.
 

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