Manufacturer-specific code

This code means different things on different makes. Find yours below.

• Toyota, Lexus

  ECM BATT malfunction

  The engine computer's permanent battery supply was interrupted, so its learned values were lost.

  Likely causes, most likely first

  1. 01Battery disconnected or replaced
  2. 02Blown EFI fuse
  3. 03Loose or corroded battery terminal
  4. 04Wiring fault in the ECM battery supply

  Severity: Low: fix when convenient · Easy DIY job