OBD Guide
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P0618

Alternative Fuel Control Module KAM Error

P0618 is an OBD-II diagnostic trouble code meaning: Alternative Fuel Control Module KAM Error. Common causes: power surge or unstable power supply to the ecu, battery disconnects at the wrong time. Estimated repair cost: $11–222.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$11–222 (est.)

Symptoms

  • The Check Engine light comes on
  • Unstable operation on alternative fuel after ECU reset
  • Increased fuel consumption until adaptation is completed
  • Unstable idle when warming up
  • The code appears after the battery is disconnected

Causes

  • Power surge or unstable power supply to the ECU
  • Battery disconnects at the wrong time
  • Physical malfunction of the non-volatile memory chip
  • Storing a car for a long time with a completely discharged battery
  • Incorrect actions when programming the computer

How to Fix

  1. Reset the error code and check for recurrence
  2. Charge or replace the battery to ensure stable power supply
  3. Perform the procedure for adapting the engine to alternative fuel according to the instructions
  4. Perform several warm-up cycles to restore adaptations
  5. If it appears again - diagnostics of non-volatile memory of the ECU
  6. If a physical malfunction is confirmed, replace the ECU or module

Related codes

P0619P062FP0604P0605

Error P0618 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0618 code mean?

P0618 is an OBD-II diagnostic trouble code that indicates: Alternative Fuel Control Module KAM Error

What causes a P0618 error code?

The most common causes of P0618 include: Power surge or unstable power supply to the ECU; Battery disconnects at the wrong time; Physical malfunction of the non-volatile memory chip; Storing a car for a long time with a completely discharged battery.

How do I fix a P0618 diagnostic trouble code?

To fix P0618: Reset the error code and check for recurrence. Charge or replace the battery to ensure stable power supply. Perform the procedure for adapting the engine to alternative fuel according to the instructions. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0618?

Yes, but get it checked soon

How much does it cost to fix P0618?

The estimated repair cost for P0618 is $11–222. Actual cost depends on your vehicle, location, and labor rates.

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