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Discussion Starter · #1 ·
Got P0138 code, read 1.25V steady, replaced O2 sensor (B1S2 downstream), still getting high volts and code, what’s causing this?
 

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Discussion Starter · #2 ·
Got P0138 code, read 1.25V @ S2, replaced O2 sensor (B1S2 downstream), still getting high volts and code, what’s causing this?
Dealer found PCM had failed, B1S2 point failure, replacing with good used unit - $$$
 

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Banned from wife’s 2005 Pilot LX
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Bummer. You might check hondaautomotiveparts.com
to see what a new unit sold at ~35% discount compares to the used unit.
 

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You can get a used ECU from the ebay pretty cheap and with warranty. The key programmer costs $120 and you can keep it for all other vehicle.
 
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