P420...Which Cat? P1831?
#1
P420...Which Cat? P1831?
Computer replaced and still throwing p0420, which catalytic converter is this? Is it the one that comes off the forward bank near the oil filter? Is this a pretty simple unbolt the old and bolt in for the new one?
Also, now getting code P1831, transfer case counter clockwise shift relay coil short circuit to ground...Huh?
Also, now getting code P1831, transfer case counter clockwise shift relay coil short circuit to ground...Huh?
#2
P0420 is thrown when the up stream and downstream O2 sensors are showing values too close together. This condition (catalyst efficiency) may indicate a bad cat, or a problem with one (or both) of the O2s/connectors/wiring. I'd check those first before ripping a the cat off (they're not cheap!). BTW, the code indicates a problem with Bank 1. Good luck!
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Lcgi (04-17-2012)
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dmatthewman
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