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.

Fuel Level Sensor 2 Circuit High Voltage

Volkswagen secondary-air relay J299 open circuit

The secondary-air pump relay circuit is shorted to B+

Secondary-air pump relay control is shorted to ground

An electrical fault in the secondary-air pump relay circuit

Purge Control Valve Control Open Circuit

Purge Control Valve Control Circuit Signal Low

Floor Temp Switch Circuit

Volkswagen EGR position adaptation and a failed basic setting

Purge Control Valve Control Circuit Signal High

Purge Valve Stuck Open

Maxima small-leak diagnosis uses positive tank pressure

Fuel Tank Pressure Control System Low Input

EGR Valve Power Stage Open

Leakage Diagnostic Pump Control Open Circuit

Evaporative Emission (EVAP) System Flow During Non-Purge

ELC System 1

the 2001 Altima uses this code for a very small EVAP leak

Fuel Tank Pressure Control System High Input

EGR Valve Circuit Open Short To Ground

Leakage Diagnostic Pump Control Circuit Signal Low

EVAP Vacuum Switch High Voltage During Ignition On

Secondary Air Injection System Monitor Circuit High Voltage

Subaru fuel-level performance problem 2

EGR Valve Position Sensor Signal Too High

Leakage Diagnostic Pump Control Circuit Signal High

Ford purge-flow diagnosis changes with the EVAP application

EVAP System Purge Flow Fault

EVAP Purge Control Solenoid 2 Circuit Fault

EVAP Canister Control Vacuum Switch Circuit Fault

EVAP Control System Vent Control Function Problem

EGR Valve Position Sensor Signal Too Low

Diagnostic Module Tank Leakage DM-TL Pump Control Open Circuit

Purge Flow Sensor Circuit Input Low

EVAP Purge Flow Sensor Circuit Low Voltage

Altima detects purge when the valve should be closed

EGR Valve Position Sensor Range Performance

Diagnostic Module Tank Leakage DM-TL Pump Control Circuit Signal Low

Ford purge-flow sensor circuit fault versus inadequate purge flow

EVAP Purge Flow Sensor Circuit High Voltage

EVAP Canister Purge Volume Control Valve

Catalyst Temperature Sensor 2 Circuit Range Performance

Diagnostic Module Tank Leakage DM-TL Pump Control Circuit Signal High

Evaporative Vacuum Solenoid Circuit

Altima vent restriction can imitate a valve stuck closed

Catalyst Temperature Circuit Short To Ground

Diagnostic Module Tank Leakage DM-TL Pump Too High During Switching

ELC System Closure Valve Flow

Altima purge monitoring depends on throttle-state information

Catalyst Temperature Circuit Open Short To B+

Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching

ELC System 2

Altima vent does not seal when EVAP diagnosis requests it

Catalyst Temperature Sensor 2 Circuit Short To Ground

DMTL reference-measurement current is too high

Canister Drain Cut Valve Open Or Short 1.8L

Evaporative Check Solenoid Circuit

Catalyst Temperature Sensor 2 Circuit Open Short To B+

Diagnostic Module Tank Leakage DM-TL Switching Solenoid Open Circuit

Barometric Pressure Sensor Circuit

Ford fuel-tank vacuum does not recover as expected

Barometric Pressure Sensor Circuit Fault

Excessive Vacuum Leak

Unable To Bleed Up Fuel Tank Vacuum

Barometric Pressure Sensor Too Low Or Too High

Secondary Air Injection System Circuit Short To B+

Diagnostic Module Tank Leakage DM-TL Switching Solenoid Control Circuit Signal Low

Barometric Pressure Sensor Performance

Ford canister-vent solenoid voltage disagrees with its commanded state

Canister Vent Solenoid Circuit

Secondary Air Injection Circuit Short To Ground

DMTL switching-solenoid circuit high

Inability of Evaporative Emission Control System to Bleed Fuel Tank

Secondary Air Injection System Circuit Open

An open secondary-air relay control path

Fuel Tank Pressure Relief Valve Malfunction

Exhaust Gas Temperature Sensor 1 Open Short To B+

Secondary Air Injection Pump With Series Resistor Control Circuit Electrical

Evaporative Emission Control System Vacuum Test

Exhaust Gas Temperature Sensor 1 Short To Ground