Home/Chevrolet/Silverado 3500 HD/Chevrolet Silverado 3500 HD (2007-2012)/Repair manual/Testing & Diagnostics/P0121

Contents

Wiring diagrams Section: Testing & Diagnostics

Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L - Introduction (1 of 2): Specifications
Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L - Introduction (1 of 2): Overview
Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L - Introduction (1 of 2): Diagnosis
Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L - Introduction (1 of 2): Removal & Installation
Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L - Introduction (1 of 2): Overhaul
Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L - Introduction (1 of 2): Maintenance
Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L - Introduction (1 of 2): Component Locations
Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L - Introduction (1 of 2): Other

Engine Controls and Fuel - 4.3L - Introduction (1 of 2)

Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L - Introduction (2 of 2)

Engine Controls and Fuel - Hybrid (HP2) 6.0L (Lfa) - Introduction (2 of 2)

Engine Controls and Fuel - 6.6L - Introduction (2 of 2)

All sections

P0121 Chevrolet Silverado 3500 HD

Testing & Diagnostics

DTCs P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0128, P0315, P0335, P0336 are not set.
The engine speed is more than 450 RPM.
DTC P0121 run continuously when the above conditions are met.