C1106
Traction Control Disable Switch Circuit Short to Battery
Chassis Chassis/Safety Traction Control Circuit 🔴 Serious — Stop or limit driving
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What This Actually Means
In plain language — no jargon

The traction control disable switch is stuck in the "on" position, sending a constant battery voltage signal to the ECU instead of a proper ground signal. It's like a light switch that's permanently flipped to the "on" position when it should be able to toggle between on and off.

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Symptoms You May Notice
3 known symptoms for this code
Traction control warning light illuminated on dashboard
Traction control system disabled or inoperative
Loss of stability control functionality
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors the traction control disable switch circuit for a clean ground signal when the switch is activated and battery voltage when inactive. A short to battery means the circuit is stuck at high voltage, preventing the ECU from detecting proper switch state transitions.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Switch Signal Voltage 0V (ground) when activated, 12V (battery) when inactive Constant 12V regardless of switch position
Signal Continuity Clean transitions between 0V and 12V No transition; stuck at battery voltage
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Traction control disable switch connector
Inspect and reseat the switch connector at the steering column to eliminate corroded pins or loose contacts.
2
Traction control disable switch wiring harness
Check the wiring harness for damaged insulation or pinched wires creating an unintended short to battery voltage.
3
Traction control disable switch assembly
Replace the switch if it is internally shorted or malfunctioning and cannot be repaired by connector cleaning.