P0546
Vehicle Speed / Idle Control — Code P0546
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i Description
Diagnostic trouble code P0546 relates to the vehicle speed / idle control. The vehicle's control module has detected a fault condition in this circuit or system. Consult a manufacturer-specific service manual for detailed information about this code for your particular vehicle.
? Common Causes
- Faulty speed sensor
- Idle air control valve failure
- Throttle body fault
- Vacuum leak
! Symptoms
- Erratic idle
- Speedometer malfunction
- Stalling
- Surging idle
# Diagnostic Steps
- Test speed sensor signal
- Clean or replace idle air control valve
- Inspect throttle body
- Check for vacuum leaks
⚙ Typical Fix
Diagnose and repair the vehicle speed / idle control fault. Inspect wiring, connectors, and the related component. Replace as necessary.
Parts Needed
Refer to manufacturer service manual for specific parts
Estimated Cost
$100-$400
↔ Related Codes
Q Frequently Asked Questions
Code P0546 relates to the vehicle speed / idle control. You can likely drive short distances, but have it checked soon to prevent further issues.
Repair costs vary depending on the specific cause. For vehicle speed / idle control issues, expect to pay $100-$400 in Australia, including parts and labour. Get a proper diagnosis before committing to repairs.
☞ Learn More
- What is OBD-II? — Complete guide to your car's diagnostic system
- How to Read DTC Codes — Step-by-step with a Bluetooth scanner
- OBD-II Scanner Buying Guide — Find the best scanner for your car