What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
C1556-16Height Sensors Implausible - Out Of PlaneManufacturer communications
3Original wording in English
JEEP
Reported code forms C1556-16
Air Suspension Slow to Change Height This bulletin involves inspecting the vehicle for pinched front air suspension lines. The customer may notice a ?Service Air Suspension? message in the cluster. Upon further…
RAM
Reported code forms C1556-14
Air Suspension Compressor Inoperative This bulletin involves replacing the Air Suspension Compressor Assembly. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further…
MERCEDES-BENZ
Reported code forms C155664
XENTRY (MERCEDES); AIR SUSPENSION. VEHICLE SYMBOL WITH ARROW POINTING UPWARDS IN DISPLAY AND STOP CAR TOO LOW OR MALFUNCTION AS WARNING MESSAGE. FAULT CODE C155664 OR/AND C156A00 OR/AND C156C00 OR/AND C156D00 AND/OR…
Check vehicle applicability
6A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.