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Old 11-09-2015, 05:23 PM
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Jeeper
 
Join Date: Jun 2012
Location: nashville
Posts: 76
Heater circuit low voltage

Check engine light on. Codes p0031 b1-s1 Heat circuit low .
P0037 b1-s2 heater circuit low
P0051 b2-s1 heater circuit relay low
P0057 b2-s2 heater circuit relay low .

Runs fine no issue . No other electrical issues . Just check engine light on and won't pass emissions . I got 3.6 ohms on all o2 sensors but I never got 12v on the feeding connectors . There was volts there but low . Seemed like ohms for feeding connections were .2-.3 if I was reading right . Anyone help me with this? Simone told me maybe. Clogging catalytic converter ?

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Old 11-10-2015, 10:20 AM
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Join Date: Jun 2012
Location: nashville
Posts: 76
There's a tsb about rewiring the heater circuit to relays in the pdc . The ones I've read about don't exactly have the same codes tripping as mine but are heater circuit issue . And after all my checks the thing I see is just low voltage . For what my tj is doing does this require seem like a good idea ?
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