Is your vehicle struggling to take fuel at the pump? If you’re dealing with a “hard-to-fill” condition, where the pump clicks off too early or fuel trickles in slowly, don’t rush to replace the vapor canister.

According to FCA TSB 25-009-24, the most common cause is often not the canister at all — but the ESIM (Evaporative System Integrity Module) Detector or associated hoses.

Here’s a breakdown of what to check before replacing any major parts:

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Step-by-Step Diagnostic Guide

1. Replicate the Issue at a Gas Station

Before replacing anything, try to recreate the slow-fill condition at the pump. If it consistently occurs, move on to the next checks.

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2. Inspect the Clean Air Hose Between ESIM and EVAP Air Filter

Look for:

• Kinks
• Pinched sections
• Disconnections

Any obstruction can block airflow and falsely trigger a vapor system fault.

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3. Check the EVAP Air Filter

A clogged or restricted filter can mimic vapor canister failure. If it’s plugged or contaminated, replace only the EVAP air filter.

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4. Examine the Vapor Hose (Tank to Canister)

Make sure the hose from the fuel tank to the vapor canister is not:

• Kinked
• Collapsed
• Pinched

Proper vapor flow is critical for fueling and emissions performance.

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5. Check for Fuel in the Vapor Canister or Recirculation Line

If fuel has backed up into these components:

• Drop the fuel tank
• Remove the Fuel Delivery Module (FDM) lock ring
• Inspect the internal vapor line
• Drain excess fuel and reconnect the vapor line if it has come loose

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6. Replace Components as Needed

If tests confirm:

• A flooded vapor canister
• A faulty or clogged ESIM Detector
  Then and only then should you replace the components. FCA recommends replacing both the ESIM Detector and vapor canister only if the issue cannot be resolved through other checks.

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Final Notes

This TSB applies to select Dodge, Jeep, Ram, and Chrysler vehicles across multiple model years. Always confirm vehicle fitment by VIN before ordering parts.

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Need Replacement Parts?

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Source & Credit:

Technical guidance sourced from FCA TSB 25-009-24. All information is paraphrased for educational purposes. For original service procedures, visit TSBsearch.com or consult an FCA-certified technician.