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DERATE — truck fault codes

by app.derate
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Interpret an engine derate

interpret_derate
Read-onlyIdempotent

Explain a diesel truck engine derate or power-loss symptom described in plain language (for example 'DEF light on and truck limited to 55 mph'). Returns the most likely cause, how urgent it is, the immediate action to take, and matching public fault-code pages. This is the free public interpretation; the full guided diagnosis with tests and a work order runs in the DERATE app.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
codeNoOptional fault code already known (SPN/FMI or OBD-II).
langNoResponse language: 'es' (Spanish) or 'en' (English).es
symptomYesFree-text symptom, warning light or behavior the driver observes.
engine_familyNoOptional engine family, e.g. 'cummins'.

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