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P0441 Diagnostic and Fix for 2003 Dodge Ram 1500 4.7L Engine

Model: 03 dodge ram 1500 p/u Fault Code: P0441 Posted: 2007-11-13 21:04

I own a 2003 Dodge Ram 1500 with a 4.7L V8 engine. The check engine light has activated, displaying fault code P0441, which indicates a malfunction in the evaporative emission control system. I've already verified that the gas cap is secure and properly sealed. As a diesel mechanic, I have limited experience with gasoline-powered trucks like this one. While the truck runs smoothly under normal conditions, it exhibits a rough idle when in gear. A recent tune-up improved performance slightly, but the P0441 code has reappeared. My initial suspicion points to a faulty purge solenoid, though replacing it could be costly and I'm hesitant to proceed without confirmation. I'm seeking reliable guidance on diagnosing this issue—especially whether there are affordable or straightforward testing methods available for common components such as the leak detection pump (LDP). Any insights would be greatly appreciated.

Related fault codes
P0441
Comments (5)
Anonymous 2007-11-14 07:10

The purge solenoid is unlikely to be the root cause. A stuck contact in the leak detection pump (LDP) is far more common and typically responsible for P0441 codes on Dodge vehicles, especially models from this era.

Anonymous 2007-11-14 17:14

Thanks for the clarification! Is there a practical way to test the leak detection pump (LDP)? I have the owner's manual, but it lacks detailed instructions about how to perform an LDP inspection or function test.

Anonymous 2007-11-15 12:35

To properly test the LDP, you must manually actuate its internal switch contacts. These contacts often stick due to age or moisture. A diagnostic scanner with bi-lateral control capabilities can verify whether the pump responds when commanded—this is a key step in confirming functionality.

Anonymous 2011-10-05 21:37

I recently worked on a 2003 Dodge Dakota with P0442 and engine misfire. I replaced all engine compartment hoses, including the three charcoal canister lines (one was severely dry-rotted and split at the end). The PO302 code prompted me to replace the #2 spark plug—after which symptoms improved. However, a new PO455 appeared after 200+ miles. A smoke test revealed leaks in the hoses and canister connections. I replaced all hoses with OEM kits for better fit, passed the smoke test, and have driven over 250 miles without issues—yet now I'm seeing P0441 again. This suggests a recurring issue with the evaporative system.

Anonymous 2011-10-06 06:19

As I've noted, approximately 95% of P0440 and P0441 cases on Dodge trucks are caused by stuck contacts in the leak detection pump. The remaining 5% involve wiring or circuit faults related to that system.