P0570 — Cruise Control “Accelerate” Signal #
Note: The code description can differ depending on the vehicle manufacturer (OEM).
- Ford: Cruise Control “Accelerate” Signal Circuit Malfunction
- Toyota: Cruise Control Set/Accelerate Switch Circuit
- GM: Cruise Control Switch Signal Circuit High
- Chrysler: Speed Control Switch 2 Circuit
Summary of Code P0570 #
P0570 is a diagnostic trouble code (DTC) related to the cruise control system, specifically the “Accelerate” signal input. When this code appears, your vehicle’s onboard computer (ECU, or Engine Control Unit) has detected an abnormal signal or no signal from the cruise control “accelerate” switch. This switch is usually located on the steering wheel or the stalk, allowing the driver to increase the set speed while cruise control is active. The code may be triggered by an open circuit, short, faulty switch, or wiring issue. Over time, this fault can disable your cruise control system, affecting highway comfort and convenience.
Frequent Symptoms for Code P0570 #
When P0570 is present, the most noticeable effect is the malfunction or complete inoperability of the cruise control system. Drivers may experience a lack of response when trying to accelerate with cruise control engaged. In rare cases, other warning lights may accompany this code.
- Cruise control not engaging or working intermittently
- No acceleration when pressing the cruise “accelerate” button
- Possible illumination of the Check Engine Light or a dedicated cruise control warning light
- Inability to increase set speed using cruise controls
- No change in engine RPMs when using the cruise increase function
Probable Causes for Code P0570 #
The causes behind code P0570 typically relate to electrical issues within the cruise control switch circuit or mechanical failure of the switch itself. The most common origins are:
- Faulty cruise control “accelerate” switch (worn or stuck contacts)
- Damaged or corroded wiring/connectors in the cruise control switch circuit
- Open or shorted circuit to the switch due to insulation wear or pinched wires
- Faulty clockspring (rotating electrical connector within the steering wheel)
- Defective cruise control module (less common)
- ECU malfunction (rare)
Step-by-Step Diagnosis for Code P0570 #
Diagnosing P0570 requires a methodical approach, as the fault can be anywhere from the switch itself to deeper electrical issues. Here’s how a technician or advanced DIYer would proceed:
- Verify the code using a compatible OBD-II scanner, and check for related codes.
- Perform a visual inspection of the cruise control switch and steering wheel area for obvious damage or spills.
- Check harness connectors at the switch and under the steering column for corrosion, loose pins, or contamination.
- Test the cruise control “accelerate” switch with an ohmmeter/multimeter for proper continuity (consult service manual for pinout and values).
- Inspect the clockspring for continuity between the switch and main harness (especially if other steering-wheel functions also malfunction).
- Check for voltage and ground at the cruise switch connector using a wiring diagram.
- If all checks are good, test/replace the cruise control module or consult OEM diagnostic flowcharts for advanced troubleshooting.
Possible Repairs for Code P0570 #
Once the root cause of P0570 is identified, repairs can generally restore full cruise control operation. Typical fixes include:
- Replacing the faulty cruise control “accelerate” switch
- Repairing or replacing damaged wiring or connectors
- Replacing a defective clockspring (if continuity is lost through the steering wheel)
- Cleaning corroded or dirty contacts at the switch or harness connectors
- Replacing the cruise control module (in rare cases)
- Reprogramming or replacing the ECU (only if confirmed defective after all other steps)
Is It Safe to Drive With Code P0570? #
Yes, you can generally drive with code P0570 present, as it does not affect core driving safety or engine performance. However, cruise control functionality will be reduced or disabled, which may impact convenience during long trips. If you depend heavily on cruise control, address the issue promptly, but there is usually no immediate risk of breakdown or further damage.
Vehicles Most Affected by Code P0570 #
While P0570 can appear on nearly all modern vehicles equipped with cruise control, some makes and models are more commonly associated with this DTC, especially those with steering wheel-mounted cruise switches.
- Ford F-series, Fusion, Focus
- Toyota Camry, Corolla, RAV4
- Chevrolet Silverado, Malibu
- Chrysler 300, Dodge Charger
- Honda Accord, Civic (with steering wheel cruise controls)
- Volkswagen Passat, Jetta (certain years)
Common Mistakes & Best Practices for Code P0570 #
Misdiagnosis of P0570 often leads to unnecessary part replacements or missed root causes. To avoid frustration and extra costs, keep these pointers in mind:
- Don’t replace the cruise control module or ECU without verifying the switch and wiring first
- Always check for broken or frayed wires in the steering column and under the dash
- Test the clockspring if multiple steering wheel buttons are inoperative
- Use wiring diagrams and OEM diagnostic charts for accurate pinout and troubleshooting
- Clear the code and retest after repairs to ensure the issue is resolved
Quick FAQ for Code P0570 #
Getting a P0570 code can raise questions. Here are rapid answers to the most common ones:
- Q: Can a faulty clockspring cause P0570?
- A: Yes. The clockspring transmits signals from the steering wheel to the vehicle’s main harness. If it fails, cruise control buttons—including “accelerate”—may stop working.
- Q: Will P0570 cause my car to fail emissions testing?
- A: No. This code does not affect emissions or engine operation, but it may keep the Check Engine Light on, which in some regions could cause a test failure.
- Q: How much does it cost to fix P0570?
- A: Costs vary by root cause. Replacing a switch is inexpensive; clockspring or module replacement can be costlier, especially with labor. Always diagnose before replacing parts.
