Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Code P1558, Cruise System Problem SPS Indicated Low: Notes
PCM controlled cruise control system is designed to be self monitored to ensure desired cruise servo position and actual cruise servo position are equal to one another. PCM will set Code P1558 when actual servo position is too low when maximum servo is commanded.
Code P1558 will set when the following conditions are present.
- Throttle angle less than 50 percent.
- Desired servo position is 90 percent.
- Actual servo position is less than 2 percent.
- Above conditions for 3 seconds.
If Code P1558 is set, PCM will disengage cruise control and C/C set speed exceeds vehicle speed by greater than 5 MPH. P1558 does not illuminate the Malfunction Indicator Light (MIL).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.