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 communications
4Original wording in English
RAM
Reported code forms U0421
MODULE, Air Suspension, [SEB] For replacement of Air Suspension Control Module (ASCM) due to the following DTCs, please contact FCA Redacted Content to aid in root-cause prior to repair at FCA Redacted Content or FCA…
RAM
Reported code forms U0421
MODULE, Air Suspension, [SEB] For replacement of Air Suspension Control Module (ASCM) due to the following DTCs, please contact Santiago De La Rosa to aid in root-cause prior to repair at (248) 635-0819 or…
LAND ROVER
Reported code forms U0421-68
"ISSUE: ON L319, DISCOVERY 4 / LR4 SHOULD YOU SEE THE FOLLOWING VARIOUS U-CODES (INCLUDING BUT NOT LIMITED TO) U0415-68 U0421-68 U0416-68 U0241-00 PLEASE FOLLOW THE INSTRUCTIONS BELOW. CAUSE: THE CENTRE CONSOLE COOLER…
LAND ROVER
Reported code forms U0421-68
"ISSUE: ON L319, DISCOVERY 4 / LR4 SHOULD YOU SEE THE FOLLOWING VARIOUS U-CODES (INCLUDING BUT NOT LIMITED TO) U0415-68 U0421-68 U0416-68U0241-00 PLEASE FOLLOW THE INSTRUCTIONS BELOW. CAUSE: THE CENTRE CONSOLE COOLER…
Check vehicle applicability
5A 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.