LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 2000 >> Envoy >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 4.3L >> Self-Diagnostic System >> Diagnostic Trouble Code Definition
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Definition

NOTE: Use of Tech 1 or Tech 2 scan tool is required to retrieve DTCs. Refer to user reference manual supplied with scan tool.
DIAGNOSTIC TROUBLE CODE DEFINITION

DTC Definition
P0101  Mass Airflow System Performance
P0102  Mass Airflow Sensor Circuit - Low Frequency
P0103  Mass Airflow Sensor Circuit - High Frequency
P0106  Manifold Absolute Pressure System Performance
P0107  Manifold Absolute Pressure Sensor Circuit - Low Voltage
P0108  Manifold Absolute Pressure Sensor Circuit - High Voltage
P0112  Intake Air Temperature Sensor Circuit - Low Voltage
P0113  Intake Air Temperature Sensor Circuit - High Voltage
P0117  Engine Coolant Temperature Sensor Circuit - Low Voltage
P0118  Engine Coolant Temperature Sensor Circuit - High Voltage
P0121  Throttle Position Sensor Performance
P0122  Throttle Position Sensor Circuit - Low Voltage
P0123  Throttle Position Sensor Circuit - High Voltage
P0125  Engine Coolant Temperature Excessive Time To Enter Closed Loop Fuel Control
P0131  Heated Oxygen Sensor No. 1 Circuit - Low Voltage (Bank 1)
P0132  Heated Oxygen Sensor No. 1 Circuit - High Voltage (Bank 1)
P0133  Heated Oxygen Sensor No. 1 Circuit - Slow Response (Bank 1)
P0134  Heated Oxygen Sensor No. 1 Circuit - Insufficient Activity (Bank 1)
P0135  Heated Oxygen Sensor No. 1 Heater Circuit (Bank 1)
P0143  Heated Oxygen Sensor No. 3 Circuit - Low Voltage (Bank 1)
P0144  Heated Oxygen Sensor No. 3 Circuit - High Voltage (Bank 1)
P0146  Heated Oxygen Sensor No. 3 Circuit - Insufficient Activity (Bank 1)
P0147  Heated Oxygen Sensor No. 3 Heater Circuit (Bank 1)
P0151  Heated Oxygen Sensor No. 1 - Low Voltage (Bank 2)
P0152  Heated Oxygen Sensor No. 1 - High Voltage (Bank 2)
P0153  Heated Oxygen Sensor No. 1 - Slow Response (Bank 2)
P0154  Heated Oxygen Sensor No. 1, Bank 2 - Insufficient Activity ("L" & "M" Series)
P0154  Heated Oxygen Sensor No. 1, Bank 2 - Insufficient Activity ("S" & "T" Series)
P0155 7 Heated Oxygen Sensor No. 1, Bank 2 Circuit
P0171  Fuel Trim System Lean - Bank 1
P0172  Fuel Trim System Rich - Bank 1
P0174  Fuel Trim System Lean - Bank 2
P0175  Fuel Trim System Rich - Bank 2
P0300  Engine Misfire Detected
P0325  Knock Sensor Module Circuit
P0327  Knock Sensor Circuit
P0336  Crankshaft Position Sensor Performance
P0337  Crankshaft Position Sensor Circuit - Low Duty Cycle
P0338  Crankshaft Position Sensor Circuit - High Duty Cycle
P0339  Crankshaft Position Sensor Circuit Intermittent
P0340  Camshaft Position Sensor Circuit
P0341  Camshaft Position Sensor Performance
P0401  EGR System - Insufficient Flow
P0404  EGR Open Position Performance
P0405  EGR Position Sensor Circuit - Low Voltage
P0410  AIR Injection System ("S" & "T" Series)
P0420  Three-Way Catalyst - Low Efficiency (Bank 1)
P0440  Evaporative Emission System
P0442  Evaporative System - Small Leak Detected
P0446  Evaporative Vent System Performance
P0452  Fuel Tank Pressure Sensor Circuit - Low Voltage
P0453  Fuel Tank Pressure Sensor Circuit - High Voltage
P0461  Fuel Level Sensor Circuit Malfunction
P0462  Fuel Level Sensor Circuit - Low Voltage
P0463  Fuel Level Sensor Circuit - High Voltage
P0500  Vehicle Speed Sensor Circuit
P0506  Idle Speed - Low
P0507  Idle Speed - High
P0601  Control Module PROM
P0602  Control Module Not Programmed
P0603  Control Module Long Term Memory Reset
P0604  Control Module Random Access Memory
P0605  Control Module Programming Read Only Memory
P0704  Clutch Switch Circuit ("S" & "T" Series)
P1106  MAP Sensor Circuit Intermittent High Voltage
P1107  MAP Sensor Circuit Intermittent Low Voltage
P1111  IAT Sensor Circuit Intermittent High Voltage
P1112  IAT Sensor Circuit Intermittent Low Voltage
P1114  ECT Sensor Circuit Intermittent Low Voltage
P1115  ECT Sensor Circuit Intermittent High Voltage
P1121  Throttle Position Sensor Circuit Intermittent High Voltage
P1122  Throttle Position Sensor Circuit Intermittent Low Voltage
P1133  Heated Oxygen Sensor No. 1 - Insufficient Switching (Bank 1)
P1134  Heated Oxygen Sensor No. 1 Transition Time Ratio (Bank 1)
P1153  Heated Oxygen Sensor No. 1 - Insufficient Switching (Bank 2)
P1154  Heated Oxygen Sensor No. 1 Transition Time Ratio (Bank 2)
P1336  Crankshaft Position Sensor System Variation Not Learned
P1345  Crankshaft Position Sensor Correlation
P1351  Ignition Control Circuit - High Voltage
P1361  Ignition Control Circuit - Low Voltage
P1380  Misfire Detected - Rough Road Data Not Available
P1381  Misfire Detected - No Communication With Brake Control Module
P1404  EGR Valve Closed Pintle Position
P1415  Secondary Air Injection System - Bank 1("S" & "T" Series)
P1416  Secondary Air Injection System - Bank 2 ("S" & "T" Series)
P1441  Evaporative Emission System Flow During Non-Purge
P1508  Idle Speed Low - Idle Air Control Valve Not Responding
P1509  Idle Speed High - Idle Air Control System Not Responding
P1621  Control Module Long Term Memory Performance
P1626  Theft Deterrent Fuel Enable Signal Not Received
P1631  Theft Deterrent Start Enable Signal Not Correct