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 MANUALSCHEVROLET1998CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSION DIAGNOSIS - 4L80-E (GASOLINE)SELF-DIAGNOSTIC SYSTEMTROUBLE CODE DEFINITIONS
1998 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M
Trouble Code Definitions
1998 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Trouble Code Definitions
NOTE:
Only transmission-related trouble codes are listed. For engine-related DTC definitions, see TROUBLE CODE DEFINITIONS in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. For engine-related DTC diagnosis, see BASIC TESTING article in the ENGINE PERFORMANCE. These DTCs pertain to engine performance and must be repaired first, as engine performance and related component signals will affect transmission operation and diagnosis.
- BASIC TESTING - (4.3L 1997).
- BASIC TESTING - (4.3L 1998).
- BASIC TESTING - (5.0L 1997).
- BASIC TESTING - (5.0L 1998).
- BASIC TESTING - (5.7L 1997).
- BASIC TESTING - (5.7L 1998).
- BASIC TESTING - (7.4L 1997).
- BASIC TESTING - (7.4L 1998).
DIAGNOSTIC TROUBLE CODE (DTC) DEFINITIONS
| DTC | Circuit Affected | ||
|---|---|---|---|
| P0218 | Transmission Fluid Overtemperature | ||
| P0502 | Output Shaft Speed Sensor Circuit Low Input | ||
| P0503 | Output Shaft Speed Sensor Circuit Intermittent | ||
| P0560 | System Voltage Malfunction | ||
| P0711 | Trans. Fluid Temp. Sensor Circuit Range/Performance | ||
| P0712 | Trans. Fluid Temp. (TFT) Sensor Circuit Low Input | ||
| P0713 | Trans. Fluid Temp. (TFT) Sensor Circuit High Input | ||
| P0716 | Input Speed Sensor Circuit Range/Performance | ||
| P0717 | Input Speed Sensor Circuit No Signal | ||
| P0719 | Brake Switch Circuit Low Input | ||
| P0724 | Brake Switch Circuit High Input | ||
| P0730 | Undefined Gear Ratio | ||
| P0741 | TCC Circuit Inoperative (Stuck Off) | ||
| P0742 | TCC Circuit Inoperative (Stuck On) | ||
| P0748 | Pressure Control Solenoid Electrical Malfunction | ||
| P0751 | 1-2 Shift Solenoid ("A") Performance Malfunction | ||
| P0753 | 1-2 Shift Solenoid ("A") Electrical Malfunction | ||
| P0756 | 2-3 Shift Solenoid ("B") Performance Malfunction | ||
| P0758 | 2-3 Shift Solenoid ("B") Electrical Malfunction | ||
| P1810 | Transmission Fluid Pressure (TFP) Switch Malfunction | ||
| P1860 | TCC Pulse Width Modulated (PWM) Solenoid | ||
| ** | Electrical Malfunction | ||
| P1870 | Transmission Component Slipping | ||
| P1875 (1) | 4WD Low Circuit Malfunction | ||
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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.