MANUFACTURER REFERENCE

Generic OBD-II code references — Page 55.

Read the source definition and confirm the exact vehicle, reporting module and diagnostic procedure.

Generic OBD-II

P2405

These are code references, not a list of confirmed faults on every vehicle. Read the source and applicability notes, then match the exact vehicle, year, engine and scan report.

EVAP System Leak Detection Pump Sense Circuit Low

EVAP System Leak Detection Pump Sense Circuit High

Volkswagen EVAP pump-current instability

Fuel Cap Sensor/Switch Circuit

Fuel Cap Sensor/Switch Circuit Range/Performance

Volkswagen leak-detection pump heater open-circuit monitor

Volkswagen leak-detection pump heater control low

Volkswagen leak-detection pump heater high-current classification

Alternative Fuel Low Pressure System Leak

Alternative Fuel High Pressure System Leak

EGR slow response is evaluated using changing air-mass targets

Fuel Cap Sensor/Switch Circuit Low

Fuel Cap Sensor/Switch Circuit High

Fuel Cap Sensor/Switch Circuit Intermittent/Erratic

Volkswagen CJAA EGR and fuel-adaptation limits

front oxygen-signal limits depend on the selected gain characteristic

bank 2 front-oxygen feedback exceeds the CTUA signal-range criterion

O2 Sensor Signals Swapped Bank 1 Sensor 2/Bank 1 Sensor 3

O2 Sensor Signals Swapped Bank 2 Sensor 2/Bank 2 Sensor 3

EVAP switching-valve control circuit has an open signature

EVAP switching-valve circuit-low row contains conflicting fault wording

O2 Sensor Signals Swapped Bank 1 Sensor 1/Bank 1 Sensor 2

O2 Sensor Signals Swapped Bank 2 Sensor 1/Bank 2 Sensor 2

Throttle Actuator Control System - Ice Blockage Bank 2

SCR Inducement - Forced Engine Shutdown

Reductant Heater Coolant Control Valve Stuck Closed

low-pressure EGR cooler efficiency below its threshold

EVAP switching-valve driver detects a short to power

EVAP System Vent Valve Stuck Open

Sportage vent restriction after the valve tests correctly

HC Adsorption Catalyst Efficiency Below Threshold Bank 1

HC Adsorption Catalyst Efficiency Below Threshold Bank 2

An EGR cooling-valve open-load report is an actuator-circuit finding

A low EGR cooling-valve circuit is distinct from an open-load fault

A high EGR cooling-valve circuit needs its own electrical evidence

exhaust protection checks both temperatures and temperature differences

Exhaust Gas Temperature Too High Bank 2

Ford exhaust-temperature sensor 3 model-plausibility fault

exhaust temperature sensor 3 fails to respond after a soak

exhaust temperature sensor 3 below its electrical range

exhaust temperature sensor 3 above its electrical range

exhaust temperature sensor 3 changes implausibly fast

DPF restriction and software must match the installed filter generation

AIR pressure can be stuck inside its electrical range

secondary-air pressure is compared before engine cranking

Low secondary-air pressure signal and why the voltage matters

High secondary-air pressure signal is not proof of high airflow

AIR System Air Flow/Pressure Sensor Circuit Intermittent/Erratic Bank 1

Bank 2 AIR pressure can fail while staying within range

Bank 2 AIR pressure rationality depends on pump state

Bank 2 AIR pressure low voltage relative to its reference

Bank 2 AIR pressure high voltage and the 94% boundary

AIR System Air Flow/Pressure Sensor Circuit Intermittent/Erratic Bank 2

Particulate Filter Restriction - Ash Accumulation Bank 2

Bank2 GPF restriction monitoring needs warm, sustained exhaust flow

Repeatedly short diesel particulate-filter regeneration intervals

Particulate Filter Regeneration Duration Bank 2

Particulate Filter Regeneration Incomplete Bank 2

Particulate Filter Restriction - Soot Accumulation Too High Bank 2

AIR valve stuck-open evidence comes from a closed-valve phase

AIR System Switching Valve Stuck Closed Bank 1

a bank 2 air-valve stuck-open judgment can use lambda correction

AIR valve stuck-closed code within a pressure-flow check

AIR pump stuck-on wording can describe a control-circuit fault

AIR pump stuck-off wording and the ground-side electrical check

AIR System Pump Stuck On Bank 2

AIR System Pump Stuck Off Bank 2

AIR System High Air Flow Bank 1

AIR System High Air Flow Bank 2

particulate-filter differential pressure is unexpectedly low

filter pressure comparison suggests a downstream sensing problem

Regeneration temperature falls short of a changing target

Exhaust Temperature Too High For Particulate Filter Regeneration Bank 1

Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 2

Exhaust Temperature Too High For Particulate Filter Regeneration Bank 2

EVAP switching valve produces too little pressure change

Ford hybrid EVAP test can mislead unless the fuel-door sequence is followed

particulate-filter pressure sensor offset is implausible

filter differential-pressure signal is stuck during a transient

filter differential-pressure raw signal below its electrical floor