DI-A178
DI_a178_steeringAngleOffsetFault
Also written as DI_A178 / DI A178 / DI_a178_steeringAngleOffsetFault / di_a178_steeringangleoffsetfault
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 DI-A178 mean?
Tesla alert code in the Drive Inverter (DI) module. Drive Inverter User Alert: Steering Angle offset exceeds plausibility Steering angle offset exceeds sensor plausibility monitor threshold, faults sensor plausibility monitor Steering angle offset has faulted stability and traction control. Vehicle should be driven with extreme caution. Drive Inverter User Alert: Brake pedal required before shift can compelete Drive Inverter Warning: power conversion at motor irrational Drive Inverter Warning: Rear motor speed error Drive Inverter Warning: CMP CAN node is missing. Drive Inverter Warning: Regen limited significantly or disabled The powertrain is limiting or disabling regen braking. This can be for multiple reasons: the battery pack is too hot or cold, the battery pack is fully charged or the battery pack is limiting for another regen. The accelerator pedal might behave differently: it will provide less regen braking than normal when the accelerator pedal is fully depressed Drive Inverter Warning: ADC low-reference bad
Original Description
Drive Inverter User Alert: Steering Angle offset exceeds plausibility Steering angle offset exceeds sensor plausibility monitor threshold, faults sensor plausibility monitor Steering angle offset has faulted stability and traction control. Vehicle should be driven with extreme caution. Drive Inverter User Alert: Brake pedal required before shift can compelete Drive Inverter Warning: power conversion at motor irrational Drive Inverter Warning: Rear motor speed error Drive Inverter Warning: CMP CAN node is missing. Drive Inverter Warning: Regen limited significantly or disabled The powertrain is limiting or disabling regen braking. This can be for multiple reasons: the battery pack is too hot or cold, the battery pack is fully charged or the battery pack is limiting for another regen. The accelerator pedal might behave differently: it will provide less regen braking than normal when the accelerator pedal is fully depressed Drive Inverter Warning: ADC low-reference bad
Affected Tesla Models
What You May Notice
- DI-A178 may appear with another Tesla alert in the Drive Inverter (DI) system.
- The vehicle may limit charging, driving, comfort, or safety features depending on the active alerts.
- The alert may clear after sleep, but recurring alerts should be treated as service-relevant.
How to Diagnose and Resolve
- 1 Reboot the vehicle (hold both scroll wheels)
- 2 Check for pending OTA software updates
- 3 Monitor for recurrence over the next few days; schedule service if needed
Severity Notes
DI-A178 is an Alert in the Drive Inverter system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.