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  1. #1
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    P0051 H02S Heater Control Circuit Low (Bank 2, Sensor 1)...????

    I get this code on startup...I clear it and it is back before I can start the car....any ideas?

    Could my O2 sensor harness be bad?....I have the Dynatech long tube headers with the extension on them.



  2. #2
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    May 2007
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    I got that bank 1 sensor 2 error on my GF's Honda and rented a OBD scanner from Autozone. $200 deposit but you get a full refund when you return it. anywho, it was the O2 sensor in the Cat. Checked around every autopart store in the area and that sensor was $175 - $200. Did some research on the net and found one for $60.

    Sensor 1 i would think would be in the headers.
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  3. #3
    bipto's Avatar
    bipto is offline "If you like your LXF, you can keep it"

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    I had problem with this one when I installed my high flow cats. While re-connecting the passenger side forward 02 sensor, one of the pins pushed out of the connector housing, breaking the 02 heater cicuit. Could be a bad 02 I suppose, but I'd definitely check the connector first...
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  4. #4
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    I will check the connector...the O2s are only a few months old and the Cats are newer....I bet it is the harness.

  5. #5
    mikespy's Avatar
    mikespy is offline Fastest N/A 5.7L Magnum around!!! SOLD!
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    It's gotta be the connector or maybe the heater wire somehow got kinked.



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  6. #6
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    I fried my O2 sensors by driving thru foot deep water. Even though I had just under 100,000 miles, dealer replaced em free. Smog related stuff is supposed to last 100,000 miles, even with the Dynatec LT's.
    FRI Sidewinder cam, Dynatec Headers , BorlaCatback ,TDP - 93 octane dyno tune, 333rwhp/350 ft lbs, Police Pack Oil Cooler, SRT 8 Struts and Nivo's ,Hotchkis sway bars,B Woody end links, 285,000 miles, 275/40/20 Ventus ST's , 1/8th mile 7.707 sec /90.19 mph -- 05 QC4X4 Ram 200,000 mi . Never Trust a Fart

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