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.

Power to Cooling Fan Exceeded Normal Draw

Catalyst Temperature Sensor Circuit Shorted High

Variable Load Control Module Pin 1 Open

Catalytic Converter Overheat Detected

EGRV Circuit Malfunction

Air Injection Solenoid Circuit Open Or Shorted

EGR Vent Control Solenoid Circuit Fault

Evap Leak Monitor Pinched Hose

EGR Vacuum Control Solenoid Circuit Fault

EVAP Leak Monitor Pinched Hose Detected

Hi Speed Rad Fan CTRL Relay Circuit Open Or Shorted

EGR Boost Sensor Solenoid Circuit Fault

High Speed Radiator Fan Control Relay Circuit Fault

Auxiliary 5 Volt Supply Output Too Low

High Speed Fan CTRL Relay Circuit Open Or Shorted

High Speed Condenser Fan Control Relay Fault

Low Speed Fan CTRL Relay Circuit Open Or Shorted

Low Speed Fan Control Relay Fault

Vacuum Cut Valve Bypass Valve Circuit

EGR Valve Lift Insufficient Detected

Radiator Fan Control Relay Circuit Open Or Shorted

Vacuum Cut Valve Bypass Valve

Battery Temperature Sensor Voltage Too High

Battery Temperature Sensor High Voltage

EVAP Canister Purge Control Solenoid Valve Circuit

Battery Temperature Sensor Voltage Too Low

EVAP Canister Purge Control Valve Solenoid Valve

Leak Detection Pump Switch Or Mechanical Fault

EVAP Ventilation Switch Or Mechanical Fault

Leak Detection Pump Solenoid Circuit Open Or Shorted

EVAP Ventilation Solenoid Circuit Fault

5 Volt Supply Output Too Low

EGR Stepper Motor Malfunction Circuit 1 1.8L

EGR Stepper Motor Malfunction Circuit 2 1.8L

EGR Valve Lift Sensor High Voltage

High Speed Rad Fan Ground CTRL Rly Circuit

EGR Stepper Motor Malfunction Circuit 3 1.8L

Open Or Shorted Condition Detected In The Hydraulic Cooling Fan Solenoid Control

EGR Stepper Motor Malfunction Circuit 4 1.8L

Idle Speed Control Valve Stuck Open

Starter Signal Circuit

Vehicle Speed Sensor Intermittent

Starter Signal Circuit Fault

No Vehicle Speed Signal to TCM

Starter Signal Circuit Malfunction

Alternator FR Terminal Circuit

Radiator Fan Relay 1 Circuit Malfunction

Engine Starter Signal Circuit Fault

Fuel Pump Relay Electrical Circuit Malfunction

Idle Speed Control Valve Stuck Closed

Vehicle Speed Sensor Circuit Intermittent

Programmable Speedometer & Odometer Module Vehicle Speed Sensor Intermittent Circuit Failure

Idle Control System Malfunction Fail Safe

Fuel Pump Relay Circuit Short To Ground

Idle Speed Control Valve Closing Solenoid Control Circuit Signal High Or Low

Theft Deterrent System No Password Received

Invalid or Missing Vehicle Speed Message or Brake Data

Radiator Fan Function Problem

Fuel Pump Relay Circuit Short To B+

Idle Speed Control Valve Closing Solenoid Control Circuit Signal Low

Theft Deterrent System Password Incorrect

Load Signal From Generator Range Performance

Idle Speed Control Valve Closing Solenoid Control Open Circuit

Vehicle Speed Output Circuit

Intake Air Control Circuit Malfunction

Intake Air System Bypass Leak Detected

Idle Speed Control Valve Closing Solenoid Control Circuit Electrical

Idle Air Control System at Adaptive Clip

Idle Air Control Valve Opening Coil Voltage Low

Closed Throttle Position Does Not Close Open Circuit

Idle Speed Control Valve Open Solenoid Control Circuit Signal High

Idle Air Control Over Speed Error

Idle Air Control Valve Opening Coil Voltage High

Closed Throttle Position Switch Does Not Open Short To Ground

Idle Speed Control Valve Open Solenoid Control Circuit Signal Low

Idle Air Control Under Speed Error

Idle Air Control Valve Closing Coil Voltage Low

Idle Control System Malfunction Fail Safe

Idle System Learned Value Lower Limit Attained

Idle Speed Control Valve Opening Solenoid Control Open Circuit