P0567
Cruise Control Off Signal Malfunction
Powertrain Speed/Idle Control Cruise Control Circuit 🟡 Moderate — Fix within a week
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What This Actually Means
In plain language — no jargon

Your cruise control system isn't properly receiving the signal to turn off, like a light switch that's stuck. The ECU can't confirm the off command is working when you expect it to.

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Symptoms You May Notice
3 known symptoms for this code
Cruise control won't deactivate when brake pedal is pressed
Cruise control indicator stays illuminated on dashboard
Vehicle maintains set speed even when attempting to disable cruise
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECM monitors the cruise control off signal circuit for proper voltage transitions when the driver actuates the brake or cruise off button. It expects a clean signal drop to ground when the off command is triggered. If this signal is absent, delayed, or stuck high, the fault is recorded.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Cruise Off Signal Voltage 0V when active (brake/button pressed), 5V when inactive Signal stuck above 0.5V or fails to transition within 100ms
Signal Circuit Continuity Resistance <10 ohms when active Open circuit (>500 ohms) or intermittent connection
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Brake pedal switch
Test brake light activation; replace switch if lights don't work when pedal pressed.
2
Cruise control stalk connector
Inspect and reseat the connector on the steering column for corrosion or loose pins.
3
Cruise control wiring harness
Check for damaged insulation or pinched wires between steering column and ECM connector.