Fault Family System: Powertrain (P-Codes) 6 SAE Codes

Aftertreatment Purge Valve

Diagnostic & Technical Explanation

Code P24F6 (Exhaust Aftertreatment Fuel Air Purge Valve Stuck Open) covers the valve that purges residual fuel-air mixture from an aftertreatment fuel-injection/burner system between dosing events, flagging a mechanically stuck-open or stuck-closed condition or an open/shorted/out-of-range control circuit. A valve stuck open lets unmetered air dilute the aftertreatment fuel dosing, while one stuck closed traps unburned fuel vapor in the line; carbon deposits and a failed valve solenoid are the common causes.

These 6 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 6 times.

Codes in this family (6)

Code	Definition	Repair coverage
P24F6	Exhaust Aftertreatment Fuel Air Purge Valve Stuck Open	3 ranked fixes
P24F7	Exhaust Aftertreatment Fuel Air Purge Valve Stuck Closed	3 ranked fixes
P24F8	Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit	3 ranked fixes
P24F9	Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit Range/Performance	3 ranked fixes
P24FA	Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit Low	3 ranked fixes
P24FB	Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit High	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)

Need All 15,886 Codes as Data?

Pipe-delimited CSV, Apache Parquet and a relational SQLite database, with commercial application rights and instant download. Built for scan tools, shop software and research - not assembled one web page at a time.

License OEM Complete · $149 Standard (SAE only) · $49

$49 Standard: 9,249 SAE codes · $149 OEM Complete: all 15,886 codes, including 6,637 OEM codes across 32 makes · $149 Heavy Duty: 4,212 fault pairs (J1939) · one-time · compare tiers