P1558 Buick Code - Cruise Control Servo Indicates Low
Quick Answer
With the engine running, throttle angle input less than 50%, the Powertrain Control Module (PCM) detects a desired Servo Position Sensor position of 90% and Actual Servo Position of less than 2% for 3 seconds in the test. Common causes include Faulty Cruise Control Servo, Cruise Control Servo harness is open or shorted, Cruise Control Servo circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P1558 Buick indicates Cruise Control Servo Indicates Low.
- Common causes
- Common causes include Faulty Cruise Control Servo, Cruise Control Servo harness is open or shorted, Cruise Control Servo circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P1558 Buick Description
What are the Possible Causes of the DTC P1558 Buick?
- Faulty Cruise Control Servo
- Cruise Control Servo harness is open or shorted
- Cruise Control Servo circuit poor electrical connection
How to Fix the DTC P1558 Buick?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1558 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1558 Buick Code
1. What does the OBDII code P1558 mean on a Buick?
P1558 indicates that the cruise control servo is detecting a low signal, suggesting a potential issue with the cruise control system's operation.
2. What are the common symptoms of code P1558 in a Buick?
Common symptoms include the cruise control not engaging, the cruise control disengaging unexpectedly, or the cruise control light not illuminating.
3. What causes the P1558 code to appear in a Buick?
Possible causes include a faulty cruise control servo, damaged or corroded wiring, a defective throttle actuator, or a malfunctioning cruise control switch.
4. Can a bad fuse cause the P1558 code on a Buick?
Yes, a blown fuse related to the cruise control system can disrupt power to the servo and trigger the P1558 code.
5. How do I diagnose the P1558 code on my Buick?
Start by checking for loose or damaged wiring around the cruise control servo, inspecting the fuse, and testing the servo and related components with a multimeter.
6. Is it safe to drive with the P1558 code on a Buick?
Yes, but the cruise control system may not function, which could be inconvenient for long-distance driving. Addressing the issue promptly is recommended.
7. How do I fix the P1558 code on a Buick?
Repairs may involve replacing the cruise control servo, repairing damaged wiring, cleaning corroded connectors, or replacing a faulty switch or fuse.
8. Can a DIYer fix the P1558 code on a Buick?
If you’re comfortable inspecting wiring, connectors, and basic components, you might be able to fix it. For complex issues, seek professional help.
9. How much does it cost to repair the P1558 code on a Buick?
Repair costs can range from $50 to $300, depending on whether the issue is a simple wiring repair or requires replacing the cruise control servo.
10. Will clearing the P1558 code fix the problem on a Buick?
Clearing the code without addressing the underlying issue will only temporarily remove the code, and it will likely return. Proper diagnosis and repair are necessary.
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