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.
1999 Chevrolet Cutaway 7.4 JFACTORY OEM SERVICE PROCEDURE
Automatic Transmission (4L80-E Diesel) DTCS
AUTOMATIC TRANSMISSION (4L80-E DIESEL) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| P0218 | TRANSMISSION FLUID OVERTEMPERATURE |
| P0560 | SYSTEM VOLTAGE MALFUNCTION |
| P0711 | TFT SENSOR CIRCUIT - RANGE/PERFORMANCE |
| P0712 | TFT SENSOR CIRCUIT - LOW INPUT |
| P0713 | TFT SENSOR CIRCUIT - HIGH INPUT |
| P0716 | ISS SENSOR CIRCUIT - RANGE/PERFORMANCE |
| P0717 | ISS SENSOR CIRCUIT - LOW INPUT |
| P0719 | BRAKE SWITCH CIRCUIT - LOW INPUT |
| P0722 | OSS SENSOR CIRCUIT - LOW INPUT |
| P0723 | OSS SENSOR CIRCUIT - INTERMITTENT |
| P0724 | BRAKE SWITCH CIRCUIT - HIGH INPUT |
| P0730 | INCORRECT GEAR RATIO |
| P0731 | INCORRECT 1ST GEAR RATIO |
| P0732 | INCORRECT 2ND GEAR RATIO |
| P0733 | INCORRECT 3RD GEAR RATIO |
| P0734 | INCORRECT 4TH GEAR RATIO |
| P0741 | TCC SYSTEM - STUCK OFF |
| P0742 | TCC SYSTEM - STUCK ON |
| P0748 | PC SOLENOID CIRCUIT - ELECTRICAL MALFUNCTION |
| P0751 | 1-2 SHIFT SOLENOID VALVE - STUCK OFF |
| P0752 | 1-2 SHIFT SOLENOID VALVE - STUCK ON |
| P0753 | 1-2 SHIFT SOLENOID VALVE - ELECTRICAL MALFUNCTION |
| P0756 | 2-3 SHIFT SOLENOID VALVE - STUCK ON |
| P0757 | 2-3 SHIFT SOLENOID VALVE - STUCK OFF |
| P0758 | 2-3 SHIFT SOLENOID VALVE - ELECTRICAL MALFUNCTION |
| P1810 | TFP MANUAL VALVE POSITION SWITCH - INVALID RANGE |
| P1811 | MAXIMUM ADAPT & LONG SHIFT |
| P1860 | TCC PWM SOLENOID - ELECTRICAL MALFUNCTION |
| P1870 | TRANSMISSION COMPONENT SLIPPING |
| P1875 | 4WD LOW SWITCH CIRCUIT - ELECTRICAL MALFUNCTION |
Factory Service Tools
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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.
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