What does code P1398 mean on Jeep vehicles?
The misfire adaptive counter has reached its limit.
OBD-II Code Jeep
P1398 — Jeep — Misfire Adapter Numerator at Limit
The misfire adaptive counter has reached its limit.
Common symptoms
- Check engine light
- misfires
Possible causes
- Repeated ignition failures
- coils or spark plugs
Initial recommendation
Inspect ignition system components.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
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