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P01819 is too many digits, that is an invalid code, recheck it and correct the code.
Great, I still need some more info, is this a LE SE, XE and what engine gas or flex? I see they are all 5.6l
That decodes as an Xterra with a 4.0. I thought you said this was a Titan?
First erase self-diagnostic results. SHIFT ACT CIR [P1819] may be displayed after installing transfer control unit or transfer assembly.
This code refers to a malfunction detected in transfer shut off relay 1 and transfer shut off relay 2 or a malfunction in the transfer control device drive circuit.
Here are the tests that I have found, POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT check and TRANSFER CONTROL DEVICE.
Step 5 here says, is that why you thought it needed a new module?
PERFORM SELF-DIAGNOSIS (WITH CONSULT-II)
Is the "SHIFT ACT CIR [P1819]" displayed?
I don't know what you just said. I gave you all I had.
Ok, a simple no would suffice. That is all the tests I have.
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