We have here a 2003 Ford Expedition with a Triton 5.4 L engine. One of the common problems with Ford models is the dreaded P0171 and P0174 codes, which indicate issues on bank one and bank two. While some videos on YouTube mention a PVC elbow as the culprit, there’s a lack of specific guidance on its location and replacement.
The PVC elbow had disintegrated, almost looking like it had melted, likely due to heat accumulation. The replacement, readily available at auto shops, is an inexpensive fix but can save a significant amount compared to a mechanic’s service charge. The PVC elbow is located on the left side, tucked underneath the engine housing.
Replacing the PVC elbow significantly helps with low idle or shutter issues and resolves the lean air codes. The angle and tension of the elbow connecting the hoses may also contribute to its failure over time. Examining this particular component can be crucial in resolving the P0171 and P0174 issues that Ford Expedition owners may encounter.
It’s advisable to check this part, and with some patience and simple tools, its replacement can be completed in a few minutes. While working on car engines can be challenging due to their design, identifying and fixing the PVC elbow issue can save both time and money. Hopefully, this information assists those struggling with the P0171 and P0174 trouble codes in their Ford Expeditions.
What is the common problem with Ford models related to the P0171 and P0174 codes?
The common problem with Ford models related to the P0171 and P0174 codes is the failure of the PVC elbow, which can disintegrate or melt due to heat accumulation.
Where is the PVC elbow located in the 2003 Ford Expedition with a Triton 5.4 L engine?
The PVC elbow is located on the left side, underneath the engine housing, and can be accessed without crawling into the engine.
How difficult is it to replace the PVC elbow?
It took less than 5 minutes to replace the PVC elbow once the old piece was removed. However, the angle at which it connects may cause some tension and contribute to its failure over time.