System: Powertrain (P-Code)
SAE Standard (Generic)
Family: Fuel Injector Control Module Circuit
Code P0612: Fuel Injector Control Module Relay Control
Diagnostic & Technical Explanation
Code P0612 (Fuel Injector Control Module Relay Control) sets when the ECM detects a performance fault or relay-control problem with a standalone fuel injector control module (a separate high-current driver box used on some diesel/GDI platforms), distinct from an internal ECM injector-drive channel. Causes are a failed driver module, a bad power relay for the module, or damaged wiring/connector at the module.
First-listed procedure
Rank #1
Check fuel injector control module relay and connector
Easy DIY
This is the first procedure in the authored
consideration order, not a measured cause likelihood. Execute it only when its prerequisites
and diagnostic findings support it. Its cost and labor estimates (where known), the step-by-step procedure and the
remaining 2 procedure(s) are in the licensed dataset. Ordering context.
Full family: Fuel Injector Control Module Circuit
What this page does not show
This page publishes the fault mechanism and the code index. The licensed dataset adds, for
every one of the 15,886 codes, the full authored repair set (56,729 procedures in total)
with the fields deliberately withheld here:
- Procedures 2..n after the first-listed procedure
- Aftermarket parts cost ranges in USD (
est_parts_cost_min/max_usd)
- Professional labor-hour estimates (
est_labor_hours)
- Step-by-step diagnostic and repair instructions
- Replacement-part mappings and catalog lookups
- 6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)