OK, this morning on my way to church the CEL (Check Engine Light) came on so I stopped by AutoZone on my way home and had them pull the code. P1164 "Primary H02S (no 1) circuit range/performance Probable cause" which has been talked about ad nauseam here so I won't redo that one. Anyway, the O2 sensor is not all that difficult to remove so I pulled it out and snapped off a couple of pictures.
This website (How to Test an O2 Sensor | eHow.com
) suggests that a color other than tan means a likely bad O2 sensor (but they say it should still be tested). As you can see from the three images I uploaded, one side is grey, the other white and the top dark grey. I'm assuming the different colors are due to different exposure points. At any rate, there is nothing nowhere near tan on the O2 sensor.
My research says that a propane enrichment test needs to be performed to deduce whether it's truly the O2 sensor, and I'll call the shop tomorrow to see how much they want to charge for that little bout of fun.
Does anyone have any input? I've seen a couple threads on here where folks replaced their O2 sensors (LAF) only to have that kick off an expensive fight with their cars. Those all seemed to accompany multiple codes and in my case I only have this one. I'd hate to replace this thing @ $280 (DIY costs) just to find out it wasn't the issue.
- I've checked the wiring on the sensor (all good)
- I've checked the K & N air filter (peachy, no blocks)
- Awhile back (30k miles ago) I cleaned the EGR valve to fix bucking but I've noticed on occasion it has begun to do it again (but only once in a while).
- The car threw a P1456 code a month ago but that went away on it's own.
- I just did a 3,700 mile move cross country (it's amazing how much stuff you can fit in these little guys).
- The car has 145k on it, so it's well overdue for the O2 sensor to go out (I hear 100k lifespan)