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 MANUALSCHEVROLET2000CAB & CHASSIS K2500, 7.4 J, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 484 (ENGINE CONTROLS - SELF-DIAGNOSTICS - 6.0L BI-FUEL & CNG)
2000 Chevrolet Cab & Chassis K2500, 7.4 J, Automatic
Section 484 (Engine Controls - Self-Diagnostics - 6.0L Bi-Fuel & CNG)
2000 Chevrolet Cab & Chassis K2500, 7.4 J, AutomaticSECTION Section 484 (Engine Controls - Self-Diagnostics - 6.0L Bi-Fuel & CNG)
WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Self-Diagnostic System
- Programming
- Drive Cycles
- Summary
- Diagnostic Trouble Code Definitions
- Component Locations
- Connector Identification
- System Tests
- Diagnostic Tests
- Notes
- DTC P0005: Fuel Shutoff Valve "A" Control Circuit/Open
- DTC P0148: Fuel Delivery Error
- DTC P0171: Fuel Trim System Lean - Bank 1 & DTC P0174: Fuel Trim System Lean - Bank 2
- DTC P0172: Fuel Trim System Rich - Bank 1 & DTC P0175: Fuel Trim System Rich - Bank 2
- DTC P0182: Fuel Tank Temperature Sensor Circuit - Low Voltage
- DTC P0183: Fuel Tank Temperature Sensor Circuit - High Voltage
- DTC P0187: Fuel Rail Temperature Sensor Circuit - Low Voltage
- DTC P0188: Fuel Rail Temperature Sensor Circuit - High Voltage
- DTC P0191: Fuel Rail Pressure Sensor Circuit Performance
- DTC P0192: Fuel Rail Pressure Sensor Circuit - Low Voltage
- DTC P0193: Fuel Rail Pressure Sensor Circuit - High Voltage
- DTC P0200: Injector Control Circuit Voltage
- DTC P0300-P0308: Engine Misfire Detected
- DTC P0611: Fuel Injector Control Module Performance
- DTC P1020: Incorrect Voltage On A CNG Fuel Injector Control Circuit
- DTC P1021-P1028: Incorrect Voltage On A CNG Fuel Injector Control Circuit
- DTC P1204: Vehicle Does Not Start On CNG
- DTC P1207: Fuel Rail Pressure Output PWM Signal Not Received By Pcm
- DTC P1209: FICM Diagnostic Output PWM Signal Not Received By Pcm
- DTC P1432: Fuel Tank Pressure Sensor Signal Low
- DTC P1433: Fuel Pressure Sensor Signal High
- DTC P2146: Incorrect Voltage Detected - Command State Of AFO Enable Circuit
- DTC P2665: Incorrect Voltage Detected - Low Pressure Lock-Off Solenoid
- Wiring Diagrams
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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.