Fault codeOEM standard
P0301 - Cylinder 1 misfire detected
Generic OBD-II definition, then narrowed by vehicle, engine, symptoms, and known failure patterns.
Evidence-backed repair guidance
Mechanical answers that show their working.
MechIQ helps mechanics move from fault code or symptom to likely cause, checks, specialist tools, repair guidance, and source confidence.
Live answer preview
2014 Ford Fiesta 1.0 EcoBoost
P0301, rough idle, power loss under load
ConfidenceHighEvidence6 sourcesSkill levelDIY to trade
Why it exists
Generic AI gives guesses. MechIQ gives a trail.
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Fault-code reasoning
Search by DTC, symptom, vehicle, engine, or VIN-derived profile.
Repair guides
See likely checks, tools, parts, labour estimate, and common mistakes.
Source trust
Separate OEM, regulator, professional, verified community, and AI-inferred material.
Answer anatomy
Every answer is built from evidence cards.
Likely causeVerified pattern
Coil pack or spark plug failure
Ranked against DTC records, community confirmations, service notes, and repair procedure matches.
ToolsProcedure linked
OBD scanner, spark tester, basic hand tools
Shown before the job steps so the mechanic knows what is needed before committing.