Ride Level Control Module

Hi All
I have a 2016 LD 3/4, and have a continuous air suspension issue, defaulting to normal ride height only being available.
I have recently refurbed the compressor, o rings and beads, and did the overnight test with no leaks apparent. I presently have 3 codes showing -
C1A36-01 exhaust valve - intermittent
C1A27-12 compressor circuit - historic
C1A20-64 pressure increases too slow when filling reservoir - permanent
Should I replace the RLCM, the compressor or both? Or is there another issue I’m missing?

Many thanks in advance.

Hi, as you partially ruled out the compressor check the other things mantioned in the WSM for that code cos blaming the ECU is a bit extreme at this point, my money is on reservoir or pipe leak cos that's quite common or if you dont rely on the refurbished compressor go for that too but just after you ruled out the rest



eventually corroborate with the intermittent one

sierrafery said:

Hi, as you partially ruled out the compressor check the other things mantioned in the WSM for that code cos blaming the ECU is a bit extreme at this point, my money is on reservoir or pipe leak cos that's quite common or if you dont rely on the refurbished compressor go for that too but just after you ruled out the rest

View attachment 312336

eventually corroborate with the intermittent one

View attachment 312337

Click to expand...

Very much appreciated, thanks.
I will start with the reservoir and pipe leaks, thanks again

Big CWW said:

Very much appreciated, thanks.
I will start with the reservoir and pipe leaks, thanks again

Click to expand...

Many thanks for the support! Very much appreciated!
Just a short update. Found a leak on the piston end of the compressor and tried a repair, which failed. Bought a replacement compressor and the fault code is solved! Thanks again!