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.
Set Condition
At key off, the Powertrain Control Module (PCM) evaluates the state of the ESIM Switch for open or closed. If the switch is determined to be closed the PCM then energizes the Purge Solenoid for a calibrated amount of time stores and monitors that the switch opens. If the ESIM switch opens the tests passes and the PCM continues a power down routine. If the switch does not open then the PCM stores the state and it is evaluated again at the next key on. If the PCM does not detect that the ESIM Switch is open, an error is detected. Two Trip Fault. Three good trips to turn off the MIL
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.