What does code P1135 mean on Ford vehicles?
The PCM does not receive a valid signal from the ignition switch.
OBD-II Code Ford
P1135 — Ford — Ignition Switch Signal Incorrect or Missing
The PCM does not receive a valid signal from the ignition switch.
Common symptoms
- Hard starting
- check engine light
Possible causes
- Faulty ignition switch
- damaged wiring
Initial recommendation
Inspect ignition switch operation and wiring continuity.
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
Use the app to combine Ford code P1135 with your vehicle's actual symptoms for more complete diagnostic guidance.
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