Reference meaning
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.
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A 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.
Scan worksheet →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 Plane
Manufacturer communications
3Original wording in English
JEEP
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 investigation a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) set:C1556-16 - Height …
RAM
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 investigation the Technician may find the following Diagnostic Trouble Code may have been set: ? C1556-14-Ride Hei…
MERCEDES-BENZ
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 C157200 STORED. THE RELAY OF THE AIRMATIC COMPRESSOR MAY HAVE BEEN DAMAGED, RESTRICTING THE PERFORMANCE OF THE AIR…
Check vehicle applicability
6A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
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.