Fault Family System: Powertrain (P-Codes) 4 SAE Codes

Air Assisted Injector Circuit

Diagnostic & Technical Explanation

Code P0065 (Air Assisted Injector Control Range/Performance) sets when the ECM detects an out-of-range response or an electrical fault while controlling the air-assist solenoid that atomizes fuel at the injector tip for cold-start/idle quality. Causes include a clogged air-assist orifice, a failed solenoid coil, or damaged wiring to the solenoid.

These 4 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 4 times.

Codes in this family (4)

Code	Definition	Repair coverage
P0065	Air Assisted Injector Control Range/Performance	3 ranked fixes
P0066	Air Assisted Injector Control Circuit Low	3 ranked fixes
P0067	Air Assisted Injector Control Circuit High	3 ranked fixes
P2D51	Air Assisted Injector Control Circuit	3 ranked fixes

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)

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