Engine-Codes - Generic - B1266

B1266 Code - Instrument Panel System Communication Bus Malfunction Short To Battery

- Code Popularity: 17,915 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1266?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Engine Control Module (ECM)
  • Faulty Multi Display ECU
  • Faulty A/C ECU
  • Faulty Combination Meter ECU
  • The harness is open or shorted between ECU
  • ECU circuit poor electrical connection
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How to Fix the DTC B1266?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the B1266 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the B1266 Code Mean?

This Diagnostic Trouble Code (DTC) is output when +B (Battery) or GND (Ground) short occurs on instrument panel system communication bus (Engine Control Module, Multi Display, A/C ECU and Combination Meter ECU). If +B or GND short is detected on instrument panel system communication bus, separate it by bus cut relay in body ECU to prevent while communication buses failure.

B1266 Code - Instrument Panel System Communication Bus Malfunction Short To Battery

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Code B1266 Information for Specific Makes

  • B1266 Lexus Instrument Panel System Communication Bus Malfunction Short To Battery
  • B1266 Scion Instrument Panel System Communication Bus Malfunction Short To Battery
  • B1266 Toyota Instrument Panel System Communication Bus Malfunction Short To Battery

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