SUBARU

11-186-18

2018-12-03 · NHTSA 10153610

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Manufacturer summary

Original wording in English

This bulletin announces availability of reprogramming files to optimize the ECM. These files enhance detection of DTC P0300: RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED. If a customer presents with a rough idle concern and / or hesitation after a cold start when using winter-blend fuels, reprogram the ECM following the normal FlashWrite procedure. The new logic contains revised A/F, ignition timing and alternator controls designed to prevent an over-lean fuel mixture condition at cold start and stabilize the engine idle.

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