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.
U1A24Lost Communication With Ammonia SensorU1A24Lost Communication With Ammonia Sensor.Improvements To Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect Is Present ForU1A24Lost Communication With Ammonia Sensor.Improvements To Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect Is PresentU1A24Lost Communication With Ammonia Sensor.Improvements To Prevent/ Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect Is Present ForManufacturer communications
14Original wording in English
RAM
Reported code forms U1A24
Flash: Powertrain Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp…
RAM
Reported code forms U1A24
Flash: Powertrain Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp…
RAM
Reported code forms U1A24
Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Several software improvements are available for the…
RAM
Reported code forms U1A24
Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Several software improvements are available for the…
RAM
Reported code forms U1A24
Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Several software improvements are available for vehicles…
RAM
Reported code forms U1A24
Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Several software improvements are available for vehicles…
Check vehicle applicability
4A 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.