Powertrain
Definition only
Lights the check engine lamp
P263A: MIL Control Circuit Low
Standardized SAE J2012 code · P26xx — Computer and output circuits
What does P263A mean?
Voltage on the malfunction indicator lamp control line is below the expected window. Usually a short to ground or a shorted bulb driver.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Control wire shorted to ground
- Medium Bulb driver internally shorted
- 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 P263A on the same make and model first.
P263A in the community
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