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
Control module 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. Control module will set Code P1558 when actual servo position is too low when maximum servo is commanded.
If Code P1558 is set, control module will disengage cruise control and C/C set speed exceeds vehicle speed by greater than 5 MPH. P1558 does not illuminate Malfunction Indicator Light (MIL).
- Checks servo position sensor. If signal is not being received at control module, use Code P1565 to diagnose problem.
- Verifies vacuum portion of cruise system is operational.
- Checks for faulty brake switch.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra 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.