C0355moderate severityChassis
Load Leveling System Malfunction
on 2020 Mazda Mazda3 2.5L Skyactiv-G I4 (186 hp) ยท AWD
What this code means
Fault in the automatic load-leveling suspension system that maintains ride height under varying loads.
Symptoms
- Rear sagging under load
- Compressor running excessively
- Ride height warning
- Vehicle nose-up attitude when loaded
Common causes
- Air spring leak
- Compressor worn
- Height sensor fault
- Leveling valve stuck on mechanical systems
Diagnostic steps
- Check ride height at all four corners
- Inspect rear air springs for leaks
- Test compressor output
- Check height sensor operation
- Inspect leveling valve on mechanically leveled vehicles
Repair notes
Repair leaks and replace worn components. Adjust leveling sensor linkage if needed.
๐ Don't have a code reader?
Any of these will read and clear this code โ pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 โ
No-phone-needed handheld โ reads, clears, live data, freeze frame.
โ ANCEL official store
Serious DIY~$100
BlueDriver Pro โ
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S โ
Bidirectional tests, service resets, all systems.
โ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro โ
Full-system pro platform โ topology mapping, ECU coding, the works.
โ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases โ how we link. This never changes the specs we publish.
Other Chassis codes on this vehicle
C0021
LF Wheel Speed Sensor Range/Performance
C0021
LF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0023
LR Wheel Speed Sensor Range/Performance
C0023
LR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0025
LF Wheel Speed Sensor Circuit Intermittent
C0025
LF Wheel Speed Sensor Circuit Intermittent