Land Rover
Air suspension: pressure rises too slowly when filling the reservoir. Classic worn EAS compressor fault on Discovery 3/4, RR Sport and L322.
C1A20 fault code: what it means
C1A20: Air suspension: pressure rises too slowly when filling the reservoir. Classic worn EAS compressor fault on Discovery 3/4, RR Sport and L322.
Usual causes, most likely first
- clogged filter/drier (desiccant breaking down) restricting the compressor
- worn or overheating air compressor
- air leak at the drier cap, reservoir or valve block
- pressure sensor fault
C1A20 by make
What the repair usually costs
- Air suspension strut / air spring, each (Range Rover, Mercedes, Audi)NZ$930–NZ$3,580 · A$850–A$3,210
- Air suspension compressor (Range Rover, Mercedes, Audi)NZ$710–NZ$2,650 · A$680–A$2,450
- CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400
- Parking sensor replace, one sensorNZ$130–NZ$520 · A$130–A$510
Not sure what C1A20 means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.