DDEC III/IV Single ECM Troubleshooting – Section 83.1 Description of Flash Code 83

Section 83.1
Description of Flash Code 83

Flash Code 83 is used to identify exhaust temperature, or external pump pressure high.‪

Flash Code 83 is used to identify EGR Delta-Pressure high, or EGR temperature high. These conditions are typically due to:‪

• EGR valve stuck open
• EGR valve stuck partly open

For EGR valve assembly, see Figure "EGR Exhaust-to-Rear Assembly, Series 50 Engine" , Series 50 engines. For Series 60 engines, see Figure "Delta-P Sensor and Related Parts, Series 60 Engine" .‪

1. PWM Valve Assembly‪	6. Coolant Lines‪
2. EGR Temperature Sensor‪	7. Bracket‪
3. EGR Pressure Sensor‪	8. Pressure Sensor Connection/Hoses‪
4. EGR Cooler‪	9. Bolts‪
5. Clamps‪

Figure 1. EGR Exhaust-to-Rear Assembly, Series 50 Engine

1. Delta-P Sensor‪	8. Clip‪
2. Stud‪	9. Delta-P Tube‪
3. Isolator‪	10. Nut‪
4. Hose Clamp‪	11. Bracket‪
5. Delta-P Tube‪	12. Thermostat Housing‪
6. Nut‪	13. Bolt‪
7. Delivery Pipe‪	‪

Figure 2. Delta-P Sensor and Related Parts, Series 60 Engine