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.

Differential Pressure Feedback Electronic Sensor Circuit Upstream Hose

Differential Pressure Feedback Electronic Sensor Circuit Downstream Hose

EGR No Flow Detected

EGR Flow Out of Self-Test Range

EGR Vacuum Regulator Circuit Malfunction

EGR Barometric Pressure Sensor VREF Voltage

Secondary Air is Not Being Diverted

Secondary Air Injection System Monitor Circuit Low Voltage

Secondary Air Injection System Monitor Circuit High Voltage

Misfire Monitor Disabled Unable to Learn Trigger Wheel Profile

Secondary Air Injection System Monitor Circuit High Voltage

Evaporative Emission Control System Vacuum System Purge Control Solenoid or Purge Control Valve Fault

Purge Flow Sensor Circuit Input Low

Purge Flow Sensor Circuit Input High

Inability of Evaporative Emission Control System to Bleed Fuel Tank

EVAP Control System Canister Vent Solenoid Circuit Malfunction

Inability of Evaporative Emission Control System to Bleed Fuel Tank

Substantial Leak or Blockage in Evaporative Emission Control System

Unable To Pull Vacuum In Tank

Wide Open Throttle Air Conditioning Cutoff Circuit Malfunction

Air Conditioning Pressure Sensor Circuit Low Input

Air Conditioning Pressure Sensor Circuit High Input

Air Conditioning Pressure Sensor Insufficient Pressure Change

ACCS to PCM High During Self-Test

A/C Relay Circuit Malfunction

A/C Refrigerant Temperature Sensor Circuit Malfunction

Low Air Conditioning Cycling Period

Fan Secondary High with Fans Off

Low Fan Control Primary Circuit

High Fan Control Primary Circuit

Fan Secondary Low with Low Fans On

Fan Secondary Low with High Fans On

Power to Cooling Fan Exceeded Normal Draw

Variable Load Control Module Pin 1 Open

EGRV Circuit Malfunction

Vehicle Speed Sensor Intermittent

Programmable Speedometer & Odometer Module Vehicle Speed Sensor Intermittent Circuit Failure

Invalid or Missing Vehicle Speed Message or Brake Data

Intake Air Control Circuit Malfunction

Idle Air Control System at Adaptive Clip

Idle Air Control Over Speed Error

Idle Air Control Under Speed Error

Intake Manifold Runner Control Stuck Closed

Intake Manifold Runner Control Stuck Closed

Intake Manifold Runner Control Input Error

Intake Manifold Runner Control Input Error

Intake Manifold Runner Control Fault Stuck Open

Open or Short to A/C Compressor Clutch Circuit

Invalid Test Accelerator Pedal Movement

IMCC Circuit Malfunction Bank B

AAI Circuit Malfunction

Inertia Switch Activated

Parking Brake Switch Circuit Failure

Intake Manifold Runner Control Stuck Open

Intake Manifold Runner Control Stuck Open

Power to A/C Compressor Clutch Circuit Exceeded Normal Current Draw

Intake Manifold Temperature Valve Vacuum Actuator Connection

Power Steering Pressure Sensor Out of Self-Test Range

Speed Control Command Switch Out of Range High

Speed Control Command Switch Out of Range Low

Speed Control Output Circuit Continuity

Speed Control Unable to Hold Speed

Brake Pedal Switch Circuit Malfunction

Throttle Position Not Available

Throttle Position Sensor Disagreement Between Sensors

Pedal Position Out of Self Test Range

Pedal Position Not Available

Pedal Position Sensor Disagreement Between Sensors

ETC Power Less Than Demand

ETC In Power Limiting Mode

Electronic Throttle Monitor PCM Override

Electronic Throttle Monitor Malfunction

Electronic Throttle Monitor Data Available

Electronic Throttle Monitor Cruise Disable

Throttle Control Detected ETB Malfunction

Throttle Control Unit Malfunction

Throttle Control Unit Throttle Position Malfunction

Throttle Control Unit Modulated Command Malfunction

Throttle Control Unit Detected Loss of Return Spring

Throttle Control Unit Unable To Control Desired Throttle Angle