Check engine light for cam timing, evap leak-check or ECM communication codes (ECM update)

Added 2026-10-26 · Updated 2026-10-26

Symptoms

A check engine light with cam/crank correlation or valve timing codes (P0011, P0012, P0016-P0019, P0021 in the revision), an evaporative leak-check pump code (P2404) or U0100.

Cause

Engine control software. Subaru's bulletin also adds fuel pressure stabilization, EGR fuel-trim and evaporative-leak pump anti-seize logic, and starter relay self-shutdown.

Fix (summary)

Dealers reprogram the ECM under Subaru bulletin 09-128-24 (revised as 09-128-24R in November 2024), with separate files for 2022, 2023 and 2024 manual and automatic cars. Written for the BRZ; we did not find the matching Toyota bulletin for the GR86.

Related build entries

• Check ZD8 recalls and bulletins before you modify

Other ZN8/ZD8 problems

• Excess RTV sealant clogging the oil pickup (early FA24)
• Oil pressure drops in long, fast right-hand turns on track
• Rear turn signals may not work (2022 BRZ and GR86 recall)
• Automatic transmission code P0613 (2022 BRZ TCM update)
• Wrong load-capacity label on some dealer-accessorized GR86s
• BRZ aluminum front knuckles rule out most Gen1 brake kits

More for this car

• All Toyota GR86 / Subaru BRZ (ZN8/ZD8, 2022+) fitment answers · ZN8/ZD8 common problems
• Newsletter archive: past issues with every new and corrected entry

Sources

• Subaru service bulletin 09-128-24: ECM reprogramming for multiple DTCs (2022-24MY BRZ) — Subaru of America (bulletin hosted by NHTSA) (mfr spec; read 2026-10-26; full page read)
• Subaru service bulletin 09-128-24R: ECM reprogramming for multiple DTCs (2022-24MY BRZ; rev. 11/14/24) — Subaru of America (bulletin hosted by NHTSA) (mfr spec; read 2026-10-26; full page read)

Summaries are in our own words. Not repair instructions; consult the factory service manual.

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