P0570
Cruise Control Accelerate Signal.
- Generic
- Powertrain
- Generic code
- Low severity
How this code is built
- P
- SystemPowertrain
- 0
- Defined bySAE, the same on every car
- 5
- AreaVehicle speed, idle control and auxiliary inputs
- 70
- FaultThe specific fault in that area
What it means
P0570 is the SAE J2012 generic code for a fault in the cruise control accelerate signal circuit. The control unit monitors the accelerate (set/resume) input from the cruise control switch or its related circuit and has seen a signal that is implausible, stuck or out of range. The exact way the fault is detected and which switch inputs are monitored varies by manufacturer and model.
Symptoms
- Cruise control will not engage or accelerate/resume does not work
- Cruise control cuts out unexpectedly or will not hold set speed
- Cruise control warning or indicator light on the dash
- Malfunction indicator lamp may be illuminated
- Steering wheel or stalk buttons feel sticky or unresponsive
- Cruise control speeds up or resumes without being asked (if the input is stuck)
Possible causes
- Worn, dirty or faulty cruise control switch or steering wheel/stalk buttonslikely
- Damaged wiring, chafed loom or poor connector contact in the cruise control switch circuitlikely
- Faulty clock spring or steering wheel wiring contact (on vehicles where switch signals pass through it)possible
- Moisture or liquid spill in the switch or connector causing corrosion or a stuck signalpossible
- Brake or clutch switch fault affecting cruise control logic, where the system shares inputspossible
- Fault in the engine control unit or cruise control module, or outdated software where the manufacturer has identified onerare
How to diagnose
- Read all stored and pending codes and review freeze frame data, noting any related brake switch, throttle or vehicle speed codes
- Test the cruise control buttons for feel and operation, and check whether the fault appears when pressing or releasing a specific button
- Inspect the switch, stalk and visible wiring and connectors for damage, corrosion, moisture or loose pins
- Using a scan tool, view live data for the cruise switch inputs and check each button changes state cleanly and returns to rest
- Check the brake and clutch switch operation and signals, as these can affect cruise availability
- Check the wiring diagram for your model, then test the switch circuit for supply, ground, signal voltage and resistance, and for shorts or open circuits
- Where fitted, check the clock spring and steering wheel connections, following the manufacturer's safety procedure for airbags
- Check for applicable manufacturer software updates or service bulletins before considering the control unit
How to fix
- Replace the faulty cruise control switch or stalk assembly
- Repair or replace damaged wiring and clean or replace corroded or loose connectors
- Replace the clock spring if testing shows it is the cause
- Dry and clean contaminated connectors, and replace any switch that has liquid damage
- Replace a faulty brake or clutch switch if it is affecting the system
- Update the control unit software where a known fault exists, or repair or replace the control unit only after all other causes are ruled out
Can I keep driving?
Low severity
The car can normally be driven as the fault only affects cruise control, so book it in for repair. Take extra care if the cruise control engages or accelerates unexpectedly, and avoid using it until it is fixed.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.