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.
Diagnostic Aid
DTCs P1553 and/or P15F6 may be set by the ECM against the distance sensing cruise control module if an engine crank is made in conjunction to a bus wake up versus prior to a bus wake up (which occurs when a customer first opens the door and then cranks the engine). When the distance sensing cruise control module first wakes up, the internal microprocessor goes through an initialization that lasts less than 2 seconds. The DTCs can also be set if the battery voltage drops below 7 volts during a cranking condition. Under these conditions, the rolling count signal transmitted to the ECM for the distance sensing cruise control module may freeze while the microprocessor re-initializes. No driver information center (DIC) service messages or tell-tales will be displayed.
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.