Cruise Control Accelerate Signal
Diagnostic trouble code P0570 indicates that the powertrain control module (PCM) has detected an abnormal voltage or resistance in the cruise control accelerate signal circuit. The computer sets this code when the electrical signal from the cruise control switch fails to match the expected manufacturer parameters when the accelerate function is activated.
This code only affects the cruise control system and does not impact the engine's performance or vehicle safety. It is safe to drive, but the cruise control will likely be disabled until the issue is repaired.
Common symptoms
- Cruise control system is completely inoperative
- The vehicle will not accelerate using the cruise control buttons
- Check Engine Light (MIL) illuminates
- Cruise control indicator light on the dash fails to turn on
- Inability to set or maintain a desired cruising speed
Likely causes
- Faulty cruise control multi-function switch
- Damaged, corroded, or loose wiring and connectors in the cruise control circuit
- Faulty steering wheel clock spring (if the switch is steering wheel-mounted)
- Blown fuse related to the cruise control system
- Liquid damage to the steering wheel controls
- Faulty Powertrain Control Module (PCM) or Cruise Control Module (rare)
What to check before replacing parts
Check the cruise control system fuses.
Look for: A blown fuse indicates a short circuit that needs to be traced and repaired before replacing the fuse.
Connect a scan tool and monitor the cruise control switch PID data.
Look for: Press the accelerate button; if the scan tool does not show the switch state changing from OFF to ON, the switch or its circuit is faulty.
Visually inspect the wiring and connectors related to the cruise control switch.
Look for: Look for pinched wires, corrosion in the connectors, or disconnected harnesses, especially near the steering column.
Test the cruise control switch for proper resistance or continuity.
Look for: Using a multimeter, verify that the switch provides the manufacturer-specified resistance when the accelerate button is pressed. An open circuit or out-of-range resistance means the switch is bad.
Test the steering wheel clock spring for continuity.
Look for: If the switch tests good but the signal doesn't reach the steering column harness, high resistance or an open circuit in the clock spring indicates it has failed.
This page explains the generic P0570 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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