Cruise Control Accel Signal Malfunction
The P0570 code indicates a malfunction in the cruise control acceleration signal circuit. This typically occurs when the powertrain control module (PCM) detects an incorrect voltage or signal from the cruise control switch or related wiring. The issue can stem from a faulty cruise control switch, damaged wiring, or a malfunctioning PCM. This code is often triggered by a stuck or intermittent switch, causing the cruise control to not respond or to engage unexpectedly.
1. Most Common Causes
- Faulty cruise control switch
- Damaged or corroded wiring/connectors in the cruise control circuit
- Malfunctioning PCM (rare)
2. Symptoms You Will Notice
- Cruise control inoperative
- Cruise control light on dash flashing or staying on
- Cruise control engages or disengages unexpectedly
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for any other related codes.
Step 2: Visually inspect the cruise control switch and wiring for damage, corrosion, or loose connections.
Step 3: Test the cruise control switch continuity with a multimeter according to manufacturer specifications.
Step 4: Check the voltage and ground signals at the PCM connector for the cruise control circuit.
Step 5: If all else is fine, consider a PCM software update or replacement.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, it is generally safe to drive, but the cruise control will not function properly. Avoid using cruise control until the issue is fixed.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and replacement of the cruise control switch, depending on labor rates and parts.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.