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2022 Charger Scat Pack - Persistent EVAP Leak Code P0442

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Mike T. · rep 0 · May 22, 5:39 AM · 1 replies · solved · Question

Vehicle: 2022 Dodge Charger Scat Pack

Hey everyone,

I've got a 2022 Dodge Charger Scat Pack, and I'm dealing with a persistent Check Engine Light. The code I'm getting is P0442, which indicates an EVAP system leak (small leak detected). I've cleared it a few times, but it always comes back after a day or two of driving.

I've already checked the gas cap multiple times, made sure it's tight and not cracked. I also visually inspected some of the visible EVAP lines under the hood and near the fuel tank, but I don't see anything obvious. No fuel smell or anything like that.

Has anyone else had this issue with their newer Charger? What are the common failure points for a small EVAP leak on these cars? I'm trying to avoid a trip to the dealer if it's something I can easily fix myself.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:39 AM

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ClearTheCode admin answer:

A persistent P0442 code (EVAP System Small Leak Detected) on your 2022 Dodge Charger Scat Pack can be tricky to diagnose without specialized equipment, but there are common areas to investigate. This code means the EVAP system isn't holding pressure as expected, indicating a leak somewhere in the sealed fuel vapor recovery system.

  1. Common Causes & Inspection Points:

    • Gas Cap: While you've checked it, ensure it's an OEM cap and that the rubber seal is perfectly intact and free of cracks or debris. Aftermarket caps sometimes don't seal correctly.
    • EVAP Hoses and Lines: Inspect all rubber and plastic EVAP lines for cracks, loose connections, or damage. Pay close attention to areas where lines might rub against other components or are exposed to road debris. Common areas include lines running from the fuel tank to the charcoal canister, and from the canister to the purge valve.
    • Purge Valve (Canister Purge Solenoid): Located in the engine bay, this valve controls the flow of fuel vapors from the charcoal canister to the engine. If it's stuck open, it can cause a vacuum leak and trigger EVAP codes. You can sometimes test it with a vacuum pump or by listening for a click when activated (though this isn't foolproof).
    • Vent Valve (Canister Vent Solenoid): Located near the charcoal canister (often near the fuel tank), this valve opens to allow fresh air into the canister. If it's stuck open or has a faulty seal, it can cause a small leak.
    • Charcoal Canister: While less common, the canister itself can develop cracks or internal issues, leading to leaks.

  2. When to See a Shop:

    • If Visual Inspection Fails: If you can't find any obvious issues after a thorough visual inspection of the gas cap, hoses, and valves.
    • Smoke Test: A professional shop can perform an EVAP smoke test. This involves injecting smoke into the EVAP system and looking for where the smoke escapes, pinpointing the exact location of the leak. This is the most effective way to find small leaks.
    • Component Testing: Shops have diagnostic tools to electrically test the purge and vent valves to ensure they are functioning correctly. While a P0442 usually points to a leak, a faulty valve can sometimes mimic a leak or be the source of one.
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