P1573 Cruise Control Switch Low Voltage
The Powertrain Control Module (PCM) has detected that the voltage signal from the cruise control switch is below the minimum calibrated threshold. This typically indicates a short-to-ground in the switch signal circuit, a faulty switch assembly in the steering wheel, or a damaged clockspring.
01. Most Common Causes
- Faulty or internally shorted cruise control switch
- Signal circuit wiring shorted to ground
- Damaged clockspring with shorted contacts
- Corroded, loose, or pushed-back terminals in connectors
- Internal PCM failure (rare)
02. Symptoms You Will Notice
- Cruise control inoperative
- Cruise control light on dash may flash or stay off
03. Step-by-Step Diagnosis
Scan for codes and verify P1573 is present
Inspect cruise control switch wiring and connectors for damage or corrosion
Test switch signal voltage at PCM connector; should be above minimum threshold
Check clockspring continuity and resistance
If all else passes, test PCM with known-good unit
1. Frequently Asked Questions
Is it safe to drive?▼
Yes, the vehicle is safe to drive, but cruise control will not function. The issue does not affect normal driving or safety systems.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on whether the switch, clockspring, or wiring needs replacement. PCM replacement is rare and more expensive.