Code Definition

P0618 — Alternative fuel control module KAM signal error

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0618

P0618 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0618 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0618 fault code is set when the Engine Control Module (ECM) detects an error in the Keep Alive Memory (KAM) of the Alternative Fuel Control Module. The KAM is a section of the module's memory that retains vital data about the vehicle's operating conditions and parameters. This memory is crucial for optimising vehicle performance, especially in vehicles that run on alternative fuels such as natural gas, propane, or biofuels. The Alternative Fuel Control Module manages the engine's operation when using these fuels. A KAM error in this module suggests that there's a problem with retaining or...

Join TaT to view the complete code information and diagnostic details.

Quick Facts