Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2001CAB & CHASSIS SILVERADO 2D PICKUP, 8.1 G, 4WD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXENGINE CONTROLS - 8.1L - DIAGNOSTIC TROUBLE CODES
2001 Chevrolet Cab & Chassis Silverado 2D Pickup, 8.1 G, 4WD, Automatic
Engine Controls - 8.1L - Diagnostic Trouble Codes
2001 Chevrolet Cab & Chassis Silverado 2D Pickup, 8.1 G, 4WD, AutomaticSECTION Engine Controls - 8.1L - Diagnostic Trouble Codes
ENGINE CONTROLS - 8.1L - DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC P0101 | MAF Sensor Frequency Signal Malfunction |
| DTC P0102 | MAF Sensor Frequency Signal Low |
| DTC P0103 | MAF Sensor Frequency Signal High |
| DTC P0106 | MAP Sensor Signal Malfunction |
| DTC P0107 | MAP Sensor Voltage Low |
| DTC P0108 | MAP Sensor Voltage High |
| DTC P0112 | High IAT |
| DTC P0113 | Low IAT |
| DTC P0117 | ECT Sensor Temperature High |
| DTC P0118 | ECT Sensor Temperature Low |
| DTC P0125 | Closed Loop Coolant Temperature Malfunction |
| DTC P0128 | Engine Coolant Temperature Malfunction |
| DTC P0131 or P0151 | HO2S Signal Voltage Low |
| DTC P0132 or P0152 | HO2S Signal Voltage High |
| DTC P0133 or P0153 | High Lean To Rich Response Average Time |
| DTC P0134 or P0154 | HO2S Signal Voltage Steady Between 350-550 mV |
| DTC P0135 or P0155 | HO2S Signal Voltage Steady Between 350-550 mV |
| DTC P0137 or P0157 | HO2S Signal Voltage Low |
| DTC P0138 or P0158 | HO2S Signal Voltage High |
| DTC P0140 or P0160 | Throttle Position Malfunction |
| DTC P0141 | HO2S Signal Voltage Remains Between 300-600 mV |
| DTC P0161 | HO2S Signal Voltage Remains Between 300-600 mV |
| DTC P0171 or P0174 | Average Long Term Fuel Cell Value High |
| DTC P0172 or P0175 | Average Long Term Fuel Cell Value Low |
| DTC P0200 | Incorrect Fuel Injector Control Circuit Voltage |
| DTC P0230 | Commanded State of Driver and Actual State of Control Circuit Do Not Match |
| DTC P0300 | Emission Type/Catalyst Damaging Misfire |
| DTC P0325 | KS System Or PCM Malfunction |
| DTC P0327 or P0332 | Frequency Too High/Low |
| DTC P0335 | No CKP Sensor Signal |
| DTC P0336 | CKP Sensor Signal Out Of Range |
| DTC P0341 | CMP-to-CKP Mis-Match |
| DTC P0342 | Cam Signal Stuck Low |
| DTC P0343 | Cam Signal Stuck High |
| DTC P0351-P0358 | Ignition Control Circuit is Grounded, Open Or Shorted to Voltage |
| DTC P0401 | Low MAP |
| DTC P0404 | Difference Between Desired EGR Position and Actual EGR Position Sensor is More than 10% |
| DTC P0405 | EGR Position Sensor Voltage Low |
| DTC P0410 | AIR Pump Closed Loop Operation Malfunction |
| DTC P0418 | Commanded State Of Driver and Actual State of Control Circuit Do Not Match |
| DTC P0420 or P0430 | Catalytic Converter Oxygen Storage Capability Low |
| DTC P0440 | EVAP System Is Not Able to Achieve or Maintain Vacuum |
| DTC P0442 | EVAP System Is Able to Achieve Vacuum But Vacuum Decay is Detected |
| DTC P0443 | Commanded State of Driver and Actual State of the Control Circuit Do Not Match |
| DTC P0446 | Fuel Tank Pressure Low |
| DTC P0449 | Commanded State of Driver and Actual State of the Control Circuit Do Not Match |
| DTC P0452 | Fuel Tank Sensor Voltage Low |
| DTC P0453 | Fuel Tank Sensor Voltage High |
| DTC P0506 | Low Idle Speed |
| DTC P0507 | High Idle Speed |
| DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 | PCM Malfunction |
| DTC P0650 | Commanded State of the Driver and Actual State of the Control Circuit Do Not Match |
| DTC P0700 | MIL Request Circuit is Shorted to Ground |
| DTC P1111 | IAT Low |
| DTC P1112 | IAT High |
| DTC P1114 | ECT Sensor Temperature High |
| DTC P1115 | ECT Sensor Temperature Low |
| DTC P1120 | TP Sensor 1 Signal Voltage Too Low or High |
| DTC P1125 | APP Sensor Malfunction |
| DTC P1133 or P1153 | Lean-to-Rich/Rich-to-Lean Transitions Low |
| DTC P1134 or P1154 | HO2S Transition Time Ratio is Not at Expected Value |
| DTC P1172 | Fuel Level Sensor Malfunction |
| DTC P1220 | TP Sensor 2 Voltage Malfunction |
| DTC P1221 | TP Sensor 2 Disagrees with TP Sensor 1 by More Than 7.5% |
| DTC P1275 | APP Sensor 1 Voltage Ranges Between 0.25 - 4.22 Volts |
| DTC P1276 | APP Sensor Malfunction |
| DTC P1280 | APP Sensor 2 Voltage Too Low/High |
| DTC P1281 | APP Sensor 2 Malfunction |
| DTC P1285 | APP Sensor 3 Voltage Too Low/High |
| DTC P1286 | APP Sensor 3 Malfunction |
| DTC P1336 | PCM Has Not Learned Crankshaft Position System Variation |
| DTC P1380 | ABS Malfunction |
| DTC P1381 | Serial Data Malfunction |
| DTC P1404 | EGR Position Sensor Malfunction |
| DTC P1415 or P1416 | HO2S Voltage High |
| DTC P1441 | PCM Detects Vacuum During a Non Purge Condition |
| DTC P1514 | Speed Density Calculated Airflow Malfunction |
| DTC P1515 | TP Calibration Malfunction |
| DTC P1516 | TP Malfunction |
| DTC P1517 | TAC Module Determines That an Internal Data Test Did Not Pass |
| DTC P1518 | Invalid or Missing Serial Data Message |
| DTC P1635 | 5-Volt Reference Circuit Out Of Range |
| DTC P1639 | 5-Volt Reference Circuit Out Of Range |
| DTC P1781 | TCM MIL Request Circuit Voltage Malfunction |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.