DTC B1246: B1246 — Dim Panel Potentiometer Switch Circuit Failure: Causes, Symptoms & Fix

The B1246 OBD2 fault code relates to the Dim Panel Potentiometer Switch potentiometer circuit. This provides position or level feedback. When the circuit circuit failure, the module cannot read accurate position data. At AIscanAuto, we help drivers quickly identify OBD2 trouble codes, understand their root causes, and find the right fix.

B1246 — Dim Panel Potentiometer Switch Circuit Failure: Causes, Symptoms & Fix

The B1246 OBD2 fault code relates to the Dim Panel Potentiometer Switch potentiometer circuit. This provides position or level feedback. When the circuit circuit failure, the module cannot read accurate position data.

At AIscanAuto, we help drivers quickly identify OBD2 trouble codes, understand their root causes, and find the right fix.

Symptoms

  • Controlled device not responding properly
  • Incorrect position readings
  • Intermittent operation

Common Causes

  • Failed potentiometer — worn track
  • a general circuit failure is detected — can result from wiring faults, connector issues, or component failure
  • Wiring issues — damaged harness
  • Connector problems — corrosion

Step-by-Step Diagnosis

  1. Scan with OBD2 tool — Confirm B1246.
  2. Test operation — Check full range of movement.
  3. Test potentiometer — Measure resistance changes.
  4. Inspect wiring — Check for damage.

Repair & Solutions

  • Replace potentiometer if faulty.
  • Repair wiring.
  • Clean connectors.

Related Codes

  • B1243 — Express Window Down Switch Circuit Short to Battery
  • B1244 — Wiper Rear Motor Run Relay Circuit Failure
  • B1245 — Wiper Rear Motor Run Relay Circuit Short to Battery

External References

- OBD2Pros — Complete DTC Reference

About This Guide

This diagnostic article is an original guide created by AIscanAuto for educational and troubleshooting purposes. The technical information about OBD2 DTC codes is based on publicly available automotive diagnostic standards and industry best practices. External links provided in the "External References" section are for additional reading and context only — they do not imply endorsement or ownership of third-party content. All repair procedures should be performed by qualified technicians.