What Does P1573 Mean?
The cruise control command switch is sending a voltage signal that is below the acceptable range to the powertrain control module. This indicates either a short to ground, failed switch, or wiring issue in the speed control switch circuit.
Common Causes
35%
Faulty cruise control switch with internal short to ground
30%
Damaged or chafed wiring between switch and PCM causing short to ground
20%
Corroded or damaged connector pins at cruise control switch
10%
Failed clockspring assembly in steering column
5%
PCM internal circuit fault
Diagnostic Steps
1
Step 1: Use multimeter to check voltage at cruise control switch connector with key on - should see reference voltage (typically 5V)
2
Step 2: Test switch operation by checking resistance values across all switch positions per manufacturer specs
3
Step 3: Check wiring harness for shorts to ground between switch and PCM using continuity test
4
Step 4: Inspect clockspring connector and wiring for damage if switch is mounted on steering wheel
5
Step 5: If all wiring and switch test good, suspect PCM circuit fault and verify with known-good module
Estimated Repair Cost
$100 - $400
Parts + labor, varies by vehicle and location
The cruise control command switch is sending a voltage signal that is below the acceptable range to the powertrain control module. This indicates either a short to ground, failed switch, or wiring issue in the speed control switch circuit.
The most common cause of P1573 (Speed Control Command Switch Out of Range Low) is: Faulty cruise control switch with internal short to ground
Typical repair costs for P1573 range from $100 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains safe to drive but cruise control function will be inoperative. No impact on normal driving operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1573 to identify the root cause.
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Quick Info
Category
Powertrain
System
Cruise Control System
Difficulty
Type
Manufacturer
Recommended Tools
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