Powertrain
Definition only
Lights the check engine lamp
P263B: MIL Control Circuit High
Standardized SAE J2012 code · P26xx — Computer and output circuits
What does P263B mean?
Voltage on the malfunction indicator lamp control line is above the expected window. Typical causes are a short to battery or an open lamp.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Control wire shorted to B+
- Medium Burnt-out MIL bulb
- Low Connector pins corroded - high contact resistance
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P263B on the same make and model first.
P263B in the community
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