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Does 2012 Tundra have an oxygen sensor heater fuse ?

Discussion in 'Electrical' started by partridge512, Aug 19, 2023.

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Aug 19, 2023 at 4:22 PM

#1

#1
partridge512 [OP] New Member

Joined:

Aug 19, 2023

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#102388

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4

Vehicle:

2012 Tundra Flex 5.7L 4WD

New OEM Toyota sensor is giving error P0157 with no oxygen sensor heater voltage.
Some forums suggest checking the fuse ? I can't see that sensor listed with fuses
Any thoughts from you Tundra experts please?

partridge512, Aug 19, 2023

#1

Aug 19, 2023 at 5:26 PM

#2

#2
blackdemon_tt Battery Slayer

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Feb 27, 2020

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#43241

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3,033

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Male

Vehicle:

2007 5.7l Tundra DC SR5 long bed 2wd

TRD Sway Bar, Roll covers USA bed cover

odds are rhe O2 sensor was wired incorrectly. Ground is probably on heater and vice versa. Otherwise you would have a p0420 I think.. meaning o2 sensor has failed.

blackdemon_tt, Aug 19, 2023

#2

Aug 20, 2023 at 2:07 PM

#3

#3
partridge512 [OP] New Member

Joined:

Aug 19, 2023

Member:

#102388

Messages:

4

Vehicle:

2012 Tundra Flex 5.7L 4WD

Ah ! I found a broken wire on the power side of the connector (not the new OEM connector). Once I re-solder and heat-shrinked it, it's working great. No errors. Thanks for advice

partridge512, Aug 20, 2023

#3

blackdemon_tt and landphil like this.

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