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Warning Lights & CodesWhat a fault code means and what to check first

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Every table on the next page has a year box. Set it and the rows that do not apply drop away.

Freightliner · 2018-2026
Cascadia 126
30 entries
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Kenworth · 2013-2026
T680
30 entries
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Peterbilt · 2013-2026
Model 579
30 entries
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Volvo · 2018-2026
VNL 760 / 860
30 entries
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International · 2017-2026
LT625
30 entries
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Mack · 2018-2026
Anthem 64T
30 entries
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Western Star · 2023-2026
57X
30 entries
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Kenworth · 2010-2026
W900L
30 entries
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Peterbilt · 2007-2025
Model 389
30 entries
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Freightliner · 2013-2026
122SD
30 entries
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Freightliner · 2008-2017
Cascadia 116 (1st Gen)
30 entries
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Freightliner · 2000-2013
Columbia CL120
30 entries
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Freightliner · 2002-2017
Coronado
30 entries
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Freightliner · 2000-2007
Century Class C120
30 entries
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Freightliner · 2000-2010
FLD120 / Classic
30 entries
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Kenworth · 2000-2010
T2000
30 entries
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Kenworth · 2007-2017
T660
30 entries
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Kenworth · 2000-2026
T800
30 entries
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Kenworth · 2019-2026
W990
30 entries
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Mack · 2000-2007
Vision CXN613
30 entries
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Mack · 2006-2020
Pinnacle CXU
30 entries
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International · 2007-2017
ProStar
30 entries
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International · 2009-2026
LoneStar
30 entries
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Western Star · 2000-2026
4900
30 entries
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Western Star · 2015-2026
5700XE
30 entries
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Peterbilt · 2000-2007
Model 379
30 entries
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Peterbilt · 2006-2018
Model 387
30 entries
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Peterbilt · 2013-2025
Model 567
30 entries
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Peterbilt · 2025-2026
Model 589
30 entries
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Volvo · 2010-2025
VNL 670
30 entries
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Volvo · 2010-2025
VNL 780
30 entries
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Volvo · 2000-2026
VNM
30 entries
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TorqueLibrary — A research compilation, not an OEM manual. Green means published and traceable; amber means second-hand, so check it. Where nothing was published the page says so rather than guessing.
Built from OEM operator manuals, federal service bulletins and industry standards (SAE, TMC, Bendix, Michelin, ConMet, Accuride). Confirm every number against the manual for your specific VIN before you turn a wrench.