05 maxima. Unified meter replaced but same symptoms but meter worked fine in the car that I took it from. Is there any programming required? If so, how or what?

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? 8:52
https://www.youtube.com/watch?v=RT-SZEfeA4Q
Sep 16, 2012 - Uploaded by Factory Car Stereo Repair
Factory Car Stereo Repair .... I have nissan maximal 05..the CD part turns on but the cd won't eject...should ... I have a 2005maxima non-bose radio system. ... my speakers is super in my 05 maxima but my cd player keeps on ...

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Your voltage regulator is probably the problem. I do not know where it is. In some cars it is in the engine controller.

you'll need a systems check to see which speed sensor is acting up they can be intermittant

CODE P1574 - ASCD VECHICLE SPEED SENSOR. POSSIBLE CAUSES, HARNESS OR CONNECTORS CAN COMMUNICATION LINE IS OPEN OR SHORTED. UNIFIED METER AND AC AMP. VDC TCS ABS CONTROL UNIT WITH VDC MODELS. ABS ACTUATOR AND ELECTRIC UNIT CONTROL UNIT WITHOUT VDC MODELS. FAULTY WHEEL SENSOR. TCM AT MODELS. ECM FAILED.

Is the check engine light on? does it happen all the time? cold hot rainy damp sunny? Lets figure it out togther.

I'm experiencing the same problem. I took it to Nissan this morning. Service just called....the CD "reader" is bad. Unfortunately, he tells me, you can't just replace the reader. The more I'm reading on-line, the more I'm learning this was/is a common problem in Nissan Maxima cars.

change the air flow meter

TIMING CHAIN=LOOSE
CHECK TENSIONER OF CHAIN IF IS TOO OPEN CHAIN NEEDS REPLACEMENT.AND SO NOT RIGHT TIMING .

First off - 125K mi is nothing on that car (as long as you maintain it). The alternator is actually also the voltage regulator and this aspect of the alternator frequently fails before the actual alternator itself does and causes irregular voltage - so it makes sense you drove without the battery connected but you probably were having irregular power instead of a nice steady 14V (the other thing to know is that even if they do show 14V all the time the amperage may differ, both problems = change the alternator).

check air flue meter.take a matchstick and push into the hose .if it works change air flue meter