APS-W040
APS_w040_autopilotAngleSaturated
Also written as APS_W040 / APS W040 / APS_w040_autopilotAngleSaturated / aps_w040_autopilotanglesaturated
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does APS-W040 mean?
Tesla warning code in the Autopilot System (APS) module. One of the AP power rails is not at the desired voltage level APS detects that voltage level of a power rail is beyond of nominal range Clears when the voltage level reaches the expected value Some parts of the AP board may not be powered up fully Radar sensor health goes back to nominal APS does not receive one or more msgs from ESP for more than 10 cycles Clears when ESP msgs are received again Features that depend on ESP msgs will be disabled APS detects that CAN msg counter, length, checksum etc are not as expected Clears there is no error in CAN msg reception May cause certain msgs to timeout LWIP stack recovers from errors APS doesnt receive PARK msgs for more than 10 cycles APS starts receiving msgs from PARK APS computer executed a bad instruction APS computer generates an exception when bad instruction is executed Clears after reset / power cycle AP features will be temporarily disabled APS CAN driver has buffer full or other transmit errors Clears when CAN msg can be transmitted successfully Other ECUs may complain that AP msgs are not present Warns if APS detects communication issues with the GPS receiver APS detects a fault in GPS communication GPS receiver communication is re-established Navigation and Autosteer will be temporarily broken
Original Description
One of the AP power rails is not at the desired voltage level APS detects that voltage level of a power rail is beyond of nominal range Clears when the voltage level reaches the expected value Some parts of the AP board may not be powered up fully Radar sensor health goes back to nominal APS does not receive one or more msgs from ESP for more than 10 cycles Clears when ESP msgs are received again Features that depend on ESP msgs will be disabled APS detects that CAN msg counter, length, checksum etc are not as expected Clears there is no error in CAN msg reception May cause certain msgs to timeout LWIP stack recovers from errors APS doesnt receive PARK msgs for more than 10 cycles APS starts receiving msgs from PARK APS computer executed a bad instruction APS computer generates an exception when bad instruction is executed Clears after reset / power cycle AP features will be temporarily disabled APS CAN driver has buffer full or other transmit errors Clears when CAN msg can be transmitted successfully Other ECUs may complain that AP msgs are not present Warns if APS detects communication issues with the GPS receiver APS detects a fault in GPS communication GPS receiver communication is re-established Navigation and Autosteer will be temporarily broken
Affected Tesla Models
What You May Notice
- Autopilot System alert: One of the AP power rails is not at the desired voltage level APS detects that voltage level of a power rail is beyond o
- Camera or sensor obstruction notification on the touchscreen
- Autopilot features greyed out in the drive settings menu
How to Diagnose and Resolve
- 1 Check all cameras and sensors for dirt, ice, or obstructions — clean if needed
- 2 Reboot the vehicle
- 3 Check for OTA updates (Autopilot improvements are frequently delivered OTA)
- 4 Schedule service if Autopilot remains unavailable after cleaning and rebooting
Severity Notes
APS-W040 is a Warning in the Autopilot System system. Schedule service soon. Monitor your vehicle for additional warnings.