B1266
Instrument Panel System Communication Bus Malfunction Short To Battery
B1266 is an OBD-II diagnostic trouble code meaning: Instrument Panel System Communication Bus Malfunction Short To Battery. Common causes: damage to the dashboard wiring harness, short circuit in can bus wiring. Estimated repair cost: $56–222.
Symptoms
- No indication on the dashboard
- Incorrect operation of the speedometer, tachometer or indicators
- The Check Engine light comes on
- Lost connection with diagnostic equipment
Causes
- Damage to the dashboard wiring harness
- Short circuit in CAN bus wiring
- Malfunction of the instrument panel control unit
- Problems with power supply to system modules
- Corrosion or oxidation of connector contacts
How to Fix
- Visually inspect the instrument panel wiring harness for damage.
- Check the integrity of the CAN bus wires with a multimeter
- Examine connector contacts for oxidation
- Check the insulation resistance of the CAN bus wires
- If necessary, replace damaged wiring sections or the dashboard control unit
Related codes
FAQ
What does the B1266 code mean?
B1266 is an OBD-II diagnostic trouble code that indicates: Instrument Panel System Communication Bus Malfunction Short To Battery
What causes a B1266 error code?
The most common causes of B1266 include: Damage to the dashboard wiring harness; Short circuit in CAN bus wiring; Malfunction of the instrument panel control unit; Problems with power supply to system modules.
How do I fix a B1266 diagnostic trouble code?
To fix B1266: Visually inspect the instrument panel wiring harness for damage.. Check the integrity of the CAN bus wires with a multimeter. Examine connector contacts for oxidation. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1266?
Limited driving only, diagnose soon
How much does it cost to fix B1266?
The estimated repair cost for B1266 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
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