C1A20: Air Suspension Compressor Fault (Land Rover, C1A20-64)
Severity: medium
What it means: Land Rover's suspension system has a compressor-related fault. A Land Rover bulletin links C1A20-64 to the suspension failing to raise on vehicles with a Hitachi or old-design AMK compressor.
Safe to drive? Usually drivable with care if the vehicle is at normal height. Don't go off-road or tow until it's fixed.
Common symptoms
- Air suspension warning
- Vehicle won't raise
- Compressor running a long time
Likely causes, ranked
- Worn or faulty air suspension compressorShop
- Air leaks making the compressor overworkShop
- Compressor relayDIY
Vehicle-specific notes
- 2010–2012 Land Rover LR4: Land Rover LTB00420 covers LR3, LR4 and Range Rover Sport with a Hitachi or old-design AMK compressor: the suspension may fail to raise with C1A20-64 stored. Read the full answer · Source
What it means: Land Rover's suspension system has a compressor-related fault. A Land Rover bulletin links C1A20-64 to the suspension failing to raise on vehicles with a Hitachi or old-design AMK compressor.
Severity: Medium. Safe to drive? Usually drivable with care if the vehicle is at normal height. Don't go off-road or tow until it's fixed.
DIY or shop?
Shop for diagnosis. Some owners replace the relay themselves.
Before you replace parts
- Read all suspension codes with a scan tool that reads Land Rover modules.
- Check for air leaks with soapy water.
- Check the compressor relay and fuse.
- Ask the dealer whether the compressor bulletin applies to your VIN.
Safety / mechanic note
Verify with a mechanic. A suspension that won't raise limits ground clearance and towing. A code points to a circuit or system, not always a specific part.