Both of our car radio are having problems. in one

Nissan Radio Invalid EQ - Digital Kaos

https://www.digital-kaos.co.uk > showthread.php > 253...

Jan. 31, 2012 - you will get that if you are powering on the bench as its looking for can.but if you put it back in the original car it should be ok. If you can't repair ... Nissan Qashqai PN-2804F Invalid EQ Check ... - Digital Kaos
Jan. 20, 2018
Nisaan PN-3000P "Invalid EQ Check TH12HW" - Digital Kaos
Mar. 1, 2015
Nissan Juke & Qashqai 2014-2016 Visteon invalid eq & radio ...
Aug. 24, 2019
nissan radio invalid eq check th12hw - Digital Kaos
Apr. 28, 2017
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Radio displaying "Invalid RQ" ' Nissan Note Owners Forum

https://www.noteownersclub.co.uk > threads > radio-dis...

Jul. 11, 2014 - In order to recoup some cash I sold on my original stereo (Clarion ... that the EQ line is either not connected or its been fitted to the wrong car or ...

If your signal keeps breaking up , you might be in a poor reception area , Check if you get the same problem on other DAB stations you are tuned into.

Music player & radio apps were not working the phone displays message" certificate invalid acccording to phone's date

Step 1:

CHECK OP (Check Operation) means your radio has not received any type of
SAME alert signal (include test or demo signals) for about 10 days.

Make sure the antenna is fully extended and the stored location is correct. See
"Programming Locations and SAME Codes" on page 9 for more information.

Step 2:

Here is a link to the manual

http://www.radioshack.com/graphics/uc/rsk/Support/ProductManuals/1200521_PM_EN.pdf

P1685 Skim Invalid Key.

The Sentry Key Immobilizer Module contains a Radio Frequency (RF) transceiver and a microprocessor. The SKIM transmits RF signals to, and receives RF signals from the Sentry Key transponder through a tuned antenna ring integral to the SKIM housing. When the ignition switch is turned to the On position, the SKIM transmits an RF signal to the transponder in the ignition key. The SKIM then waits for an RF signal response from the transponder. If the response received identifies the key as valid, the SKIM sends a valid key message to the PCM over the PCI data bus. If the response received identifies the key as invalid, or if no response is received from the key transponder, the SKIM sends an invalid key message to the PCM. The PCM will enable or disable engine operation based upon the status of the SKIM messages.

you can look it up here:
http://www.engine-light-help.com/check-engine-light-domestic.html

xm will not hold signal but if I move the antenna wire around inside the vehicle it will suddenly come in clear as day

this is usually caused by a defective antenna ground or a disconnected antenna lead at the back of the radio

1) Do you have a Sirius account?

2) Have you called Sirius and given the serial number of that receiver?

Those are the first two things you have to do to get a Sirius receiver working. (The original owner could have changed his account to use his new receiver, if he has one.) Go to http://www.sirius.com/install - the "activate" part - for details.

it could be the wire that connects from the actual antenna and the radio. Even if it is new it might just be wrong from the factory.

It sound like the ant. is cut ( this happen to me) or the ant not pluged in all the way.