The P0618 trouble code indicates that there is a Keep Alive Memory (KAM) error in the Alternative Fuel Control Module. The KAM is a portion of the module’s memory that stores essential data even when the vehicle is turned off, such as fuel trim values and other parameters.
Alternative Fuel Control Module KAM Error
Code symptoms P0618.
1. Check Engine Light (CEL) illuminated on the dashboard.
2. The vehicle may experience drivability issues, such as rough idling or hesitation.
3. Reduced fuel efficiency.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0618.
1. Faulty Alternative Fuel Control Module.
2. Electrical wiring issues, such as short circuits or open circuits, in the module’s wiring harness.
3. Corroded or loose electrical connectors related to the Alternative Fuel Control Module.
4. Powertrain Control Module (PCM) software issues.
Code Solutions P0618.
1. Check the wiring and connectors associated with the Alternative Fuel Control Module for any signs of damage, corrosion, or looseness. Repair or replace wiring and connectors as needed.
2. Inspect the module itself for signs of damage or corrosion. Replace the module if necessary.
3. Perform a thorough diagnostic scan of the vehicle’s PCM to check for any related software issues. Update or reflash the PCM as needed.
4. Clear the trouble codes and test drive the vehicle to see if the P0618 code returns. If it does, further diagnosis may be necessary.