I searched here and found the most recent topic from 2016, so I thought I'd take a chance on a new thread.

I pulled the following code off the GAP tool:
C1A04-1C(2E) - Front right height sensor - General electrical failure - circuit voltage out of range.

Also, the live read on that sensor sits around 2.04v (normal, compared to the other three) but occasionally drops and stays at 0v.

The current RF height sensor is less than three years old, so my first thought was a wire break. I pulled the connector and put a meter on yellow/grey and blue/grey, and it was pulling 4.8-4.9v steady.

I then grabbed the wire bundle and bent, shook, pulled, and generally molested it at every point I could get my hands on it, and I maintained that steady voltage on the meter.

Could I be looking at a bad, young height sensor? Anywhere else I should be troubleshooting?

 

I'd always start with a calibration. Then if you decide to change the height sensor, that's okay because if that isn't the cause, you now have a good spare. I'd also check the wiring run on the other side that is attached to the frame rail. I know it's counterintuitive to check wires on the left side for a right front sensor fault, but the wires from the right eventually join that wire bundle of the left anyway, before going back to the compressor.

What are the physical effects?

Does it throw a red fault and put you on bump stops? (bad calibration)
Or does it give an amber suspension fault but things still work normally? (wire damage)

Good luck.

 

• Amber fault - "You gotta stay in Normal"
• I had to order a metric cloth tape from Amazon, but a calibration is in the cards
• Late breaking news: I had no reason to suspect this as I saw zero overnight sag, but I went under and sprayed soapy water on the struts and found some air coming out of the LF. I find it hard to believe that would be unrelated.
• I also started pulling codes for the compressor running too long.

 

Well, I think you know what to do. Pull fuses, measure, etc....if you have an air leak, determine the source and address it. You can do a calibration with a standard tape, too. In fact my friends made fun of me for using a cloth tape back in the day before GAP recommended it!

Take your time and figure it out; be glad you can stay in normal height and it doesn't drop you down to bumps....and definitely fix it before it causes your compressor to prematurely wear out.

 

Just to close the loop on this: I had a leaky reservoir tank and a bad wiring bundle for the FR level sensor.

Thanks to all who jumped in this thread to help!