EPAS-D027
EPAS_d027_KFC_FOR_TIMO
Also written as EPAS_D027 / EPAS D027 / EPAS_d027_KFC_FOR_TIMO / epas_d027_kfc_for_timo
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 EPAS-D027 mean?
Tesla diagnostic code in the EPAS (EPAS) module. Motor Driver Runtime Error: Calculation for new Pulse Width Modulation (PWM) commands has timed out. FOR has missed the time at which the PWM values for the next 500?s cycle must be calculated. The output of the PWM is cyclical, meaning one cycle is divided into several sections. After about 75% of the cycle time, the FOR needs the PWM values for the next cycle to be calculated. After the completion of processing the measured values started by the FOR, it must compute the new PWM values in approximately 20% of the cycle time. If the FOR takes longer than the beginning of the new cycle, the Error Handler reports an error and then recalculation begins.
Original Description
Motor Driver Runtime Error: Calculation for new Pulse Width Modulation (PWM) commands has timed out. FOR has missed the time at which the PWM values for the next 500?s cycle must be calculated. The output of the PWM is cyclical, meaning one cycle is divided into several sections. After about 75% of the cycle time, the FOR needs the PWM values for the next cycle to be calculated. After the completion of processing the measured values started by the FOR, it must compute the new PWM values in approximately 20% of the cycle time. If the FOR takes longer than the beginning of the new cycle, the Error Handler reports an error and then recalculation begins.
Affected Tesla Models
What You May Notice
- EPAS alert: Motor Driver Runtime Error: Calculation for new Pulse Width Modulation (PWM) commands has timed out. FOR has missed the
- Steering is functional but may feel slightly different
How to Diagnose and Resolve
- 1 Reboot the vehicle
- 2 Check for OTA software updates
- 3 Schedule service if the steering feels abnormal
Severity Notes
EPAS-D027 is a diagnostic or informational code in the EPAS system. Typically no immediate action is required.