What Does P0575 Mean?
The ECM has detected a general malfunction in the cruise control system that does not fall into a specific sub-circuit category. This catch-all code indicates the cruise control module or ECM has identified an operational fault with the overall cruise control system, which may involve communication issues between modules, multiple simultaneous input faults, or an internal processing error within the cruise control logic.
Common Causes
30%
Multiple cruise control switch failures or simultaneous signal faults confusing the ECM's cruise control logic
25%
Communication fault between the ECM and a separate cruise control module or body control module on the CAN bus
25%
ECM internal cruise control logic fault or software corruption affecting speed control processing
20%
Intermittent power or ground supply to the cruise control module or related components
Diagnostic Steps
1
Step 1: Check for additional cruise control DTCs that may provide more specific fault information. P0575 is often accompanied by more specific codes that pinpoint the actual fault.
2
Step 2: Verify cruise control fuse and relay operation. Check for battery voltage at the cruise control module or ECM cruise power supply with key on. Verify the module ground circuit has less than 0.1V drop.
3
Step 3: If the vehicle has a separate cruise control module, check CAN bus communication between the ECM and cruise module. Look for U-codes indicating lost communication.
4
Step 4: Test all cruise control switch inputs by monitoring live data while pressing each button. Identify any inputs that are stuck, missing, or producing invalid signals.
5
Step 5: If no specific fault is found, attempt an ECM power reset by disconnecting the battery for 60 seconds. If the code returns immediately after clearing, suspect an internal ECM fault or software issue requiring reprogramming.
Estimated Repair Cost
$30 - $500
Parts + labor, varies by vehicle and location
The ECM has detected a general malfunction in the cruise control system that does not fall into a specific sub-circuit category. This catch-all code indicates the cruise control module or ECM has identified an operational fault with the overall cruise control system, which may involve communication ...
The most common cause of P0575 (Cruise Control Related Malfunction) is: Multiple cruise control switch failures or simultaneous signal faults confusing the ECM's cruise control logic
Typical repair costs for P0575 range from $30 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Cruise control may be completely inoperative or may behave unpredictably. While loss of cruise control is an inconvenience, unpredictable behavior (such as failing to cancel) could be hazardous and should be diagnosed promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0575 to identify the root cause.
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Quick Info
Category
Powertrain
System
Cruise Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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