Source-backed diagnostic reference

P0203 EV diagnostic code

Fuel injector failure, Powertrain Control Module (PCM) failure, Wiring issue

Reference status: This page preserves source-backed code definitions for discovery. Manufacturer/model applicability, repair steps and safety conclusions are not treated as verified unless a manufacturer-specific verified report is available.

Reference definitions

AUDI: Fuel injector failure, Powertrain Control Module (PCM) failure, Wiring issue Source
GENERIC: Cylinder 3 Injector A Circuit Source
GENERIC: Injector Circuit Malfunction — Cylinder 3 Source

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