What Does P0576 Mean?
The ECM has detected a secondary or related cruise control malfunction that supplements the primary P0575 code. This code typically indicates an additional fault condition within the cruise control system such as an input signal range issue, a secondary validation failure, or a redundant circuit check that has failed. On some manufacturers, this code relates to cruise control input circuit low voltage.
Common Causes
35%
Cruise control input circuit reading below minimum threshold due to a short to ground in the switch network wiring
30%
Failed cruise control switch assembly with internal short circuit pulling the input voltage low
20%
Corroded cruise control connector at the steering column base allowing moisture to create a low-resistance path
15%
ECM or cruise control module detecting inconsistency between primary and secondary input validation signals
Diagnostic Steps
1
Step 1: Check for accompanying cruise control codes (P0564-P0575 range). Address the most specific codes first, as P0576 may clear once the primary fault is resolved.
2
Step 2: Measure the resting voltage on the cruise control input circuit at the ECM. With no buttons pressed, the voltage should be at a defined rest state. A reading near 0V with no input suggests a short to ground.
3
Step 3: Disconnect the cruise control switch connector and check if the ECM input voltage returns to the expected rest state. If it does, the switch or its wiring has a short.
4
Step 4: Inspect all cruise control circuit connectors for moisture intrusion, green corrosion, and terminal damage. Pay attention to the steering column base connector which is prone to condensation.
5
Step 5: If no wiring faults are found, compare cruise control input readings to manufacturer specifications during button presses. Replace the switch assembly if any contact produces out-of-range values.
Estimated Repair Cost
$30 - $400
Parts + labor, varies by vehicle and location
The ECM has detected a secondary or related cruise control malfunction that supplements the primary P0575 code. This code typically indicates an additional fault condition within the cruise control system such as an input signal range issue, a secondary validation failure, or a redundant circuit che...
The most common cause of P0576 (Cruise Control Related Malfunction) is: Cruise control input circuit reading below minimum threshold due to a short to ground in the switch network wiring
Typical repair costs for P0576 range from $30 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Cruise control functionality is impaired and may not engage or respond to driver inputs correctly. This is primarily an inconvenience, though any unpredictable cruise behavior should be addressed to ensure the system does not interfere with normal driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0576 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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