OBD-II code · Powertrain (generic, extended)
P263B MIL Control Circuit High
Voltage on the malfunction indicator lamp control line is above the expected window. Typical causes are a short to battery or an open lamp.
Is it safe to drive with P263B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl wire shorted to B+
- PossibleBurnt-out MIL bulb
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Mil Lamp, Instrument Cluster, Wiring Harness
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.