Question about 2003 Saturn ION

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No OBD Communications

I recently went to get my emissions check, and I failed because they said the OBD was not communicating. There were no fault codes, in fact there was no 12V detection whatsoever. The port is completely dead. What could cause this? Is there a relay or fuse that may be bad? Or is this going to be a costly electrical issue?

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  • myocom08 Feb 25, 2009

    One of the cigar lighers is blown (there are 2). We'll check that!

  • myocom08 Feb 25, 2009

    The lighter fuse is definately burned out. Hopefully that will fix the problem. (How seemingly unrelated... ??)

  • myocom08 Feb 26, 2009

    WOW! Well I can't believe it, but it worked! Thank you very much everyone!!! We replaced the fuse and had AutoZone run the codes and it worked!!

  • yadayada
    yadayada May 11, 2010

    does the cigar lighter work? if not the fuse is blown, this is the fuse that powers the OBD 2 connector also.

  • Daniel
    Daniel Mar 19, 2013

    same problem with '97 ford T-bird replaced the fuse, but still not connectivity.



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Only one fuse burn make this problem

Posted on Feb 25, 2009

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  • Saturn Master
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That should do it, they use the lighter circuit because it is always hot.

Posted on Feb 25, 2009


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I have multiple codes instrument cluster codes: u1073, u1262, u1059, u1123, u1041; ABS/TCS codes: u1073, u1262, C1805, B2900;

Did you change any modules on the vehicle ?
B2900 VIN Mismatched ABS Module VERIFY that the module has the correct as-built data.
CHECK for correct powertrain control module (PCM) and ABS module configuration using the diagnostic tool. RECONFIGURE the component as necessary. FOLLOW the diagnostic tool directions for the ABS module configuration or REFER to Section 303-01A or Section 303-01B for the PCM. CLEAR the DTC. REPEAT the C1805 Mismatched PCM and/or ABS/TC Module ABS Module CHECK for correct PCM and ABS module configuration using the diagnostic tool. RECONFIGURE the component as necessary. FOLLOW the diagnostic tool directions for the ABS module configuration or REFER to Section 303-01A or Section 303-01B for the PCM. CLEAR the DTC. REPEAT the self-test. U1073 SCP (J1850) Invalid or Missing Data for Engine Coolant PCM REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual. U1262 SCP (J1850) Communication Bus Fault Network Fault REFER to Section 418-00 . Can a scan tool communicate with all the modules on the vehicle ?
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The SCP communications network will remain operational even with the severing of one of the bus wires. Communications will also continue if one of the bus wires is shorted to ground or voltage, or if some but not all termination resistors are lost. The SCP communications network allows inter-module communication.
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Read this please:

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