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2021 Peterbilt 579

VIN: 1XPBDP9XXMP042788

Mileage: 287,456 miles

Owner: Rush Truck Centers

P0401 - EGR Flow Insufficient
P0171 - System Too Lean (Pending)

Recent Activity

VIN lookup completed for 1XPBDP9XXMP042788

2 hours ago

AI Assistant query about EGR system

3 hours ago

Vehicle inspection report generated

1 day ago

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What is the torque specification for the camshaft bolt?
10:30 AM
For your 2021 Peterbilt 579 with Cummins ISX12 engine, the camshaft bolt torque specification is 300 lb-ft (407 Nm). Apply in 3 stages: 150 lb-ft, 225 lb-ft, then final 300 lb-ft. Use Loctite 262 thread locker. Source: Cummins Service Manual ISX12-CM2350 Section 1-13
10:31 AM
How do I diagnose P0401 code?
10:35 AM
For the P0401 DTC on your ISX12 engine, this indicates EGR flow insufficient. Check: 1) EGR valve for carbon buildup, 2) EGR cooler passages, 3) Intake manifold restrictions. Common repair involves cleaning EGR valve assembly. Estimated time: 2-4 hours, Cost: $450-750. Reference: Cummins Troubleshooting Guide ISX12-TG Section 4.2
10:36 AM

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