Cruise Control Accel Signal Malfunction
The P0570 code indicates that the powertrain control module (PCM) has detected a malfunction in the cruise control accelerator signal circuit. This typically occurs when the signal from the cruise control switch or the brake pedal position sensor is out of expected range, or there is a wiring issue. The system may fail to engage or maintain set speed.
01. Most Common Causes
- Faulty cruise control switch
- Damaged wiring or connector in the cruise control circuit
- Malfunctioning brake pedal position sensor
- Failed PCM (rare)
02. Symptoms You Will Notice
- Cruise control does not engage
- Cruise control disengages unexpectedly
- Check Engine Light illuminated
- Accelerator pedal may feel unresponsive
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for other related codes.
Step 2: Visually inspect the cruise control switch and wiring for damage or corrosion.
Step 3: Test the brake pedal position sensor for proper operation.
Step 4: Check the cruise control actuator and vacuum lines (if applicable).
Step 5: Clear the code and test drive to see if it returns.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, but cruise control will not work. The vehicle remains drivable, but you should address the issue soon to restore cruise control functionality.
How much does it cost to fix?▼
Typically between $50 and $150 for diagnosis and repair, depending on the cause. Replacing a switch or sensor is usually under $100, while wiring repairs may cost more.