Recurring engine bank 1 sensor 1 trouble code
about 2 months ago i posted a thread where i learned how to scan the engine for DTCs. the CEL had come on and i scanned to find the 2005 chevy 6.0L (the chevy has 43,000 mi) had two codes: P0449 (EVAP...
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thanks to this clue from turbojimmy, "I can clearly see all 4 sensors from underneath. I've had to change 2 of them, both post cat tho," i got back under to look more.
i knew catastrophic converters were big, but all the internet drawings led me to believe the cats were within the exhaust manifold close to engine. well, once i spotted my 2 catalytics under the coach and found both #2 sensors there behind the canisters, i see that what i thought was HO2S bank 1 sensor 2 is actually sensor 1 - the upstream O2 sensor i probably need to change for DTC P0053.
thanks guys...think i'll see how hard removing the harness is, and start off using WD40 to penetrate and a 7/8" wrench.
TBC...
i knew catastrophic converters were big, but all the internet drawings led me to believe the cats were within the exhaust manifold close to engine. well, once i spotted my 2 catalytics under the coach and found both #2 sensors there behind the canisters, i see that what i thought was HO2S bank 1 sensor 2 is actually sensor 1 - the upstream O2 sensor i probably need to change for DTC P0053.
thanks guys...think i'll see how hard removing the harness is, and start off using WD40 to penetrate and a 7/8" wrench.
TBC...
