2012 Ram 3500 6-7L Cummins P0087 Code: Repeated Failures After Multiple Repairs and No Resolution
I own a 2012 Ram 3500 with the 6.7L Cummins engine, currently at 180,000 miles. This truck has been serviced by Dodge nine times over the past years, resulting in over $5,800 spent—yet I still haven't resolved the issue. The problem began around 132,000 miles. Dodge has replaced: - Fuel filter three times - Fuel canister once - Fuel rail pressure relief valve twice - In-tank fuel pump once - CP3 fuel ejector pump (new) - Multiple flash updates (number not known) After returning the truck from Dodge yesterday, I drove it for about five minutes while connected to my trailer. Immediately after, the Check Engine light activated and displayed code P0087. Dodge repeatedly tells me that this is the root cause and will only confirm if the light goes off—if it returns, they claim two or more parts must be replaced. However, no actual repairs have been made to the truck—the same unit has remained unchanged. The vehicle is stock: no EGR bypass, no tuning modifications. Despite these efforts, the P0087 code persists and triggers under load conditions—specifically when decelerating from 60 mph to 35 mph. I am now facing repeated bills with no real solution. I need expert advice on how to diagnose and fix this persistent P0087 issue in a stock 2012 Ram 3500 6.7L Cummins engine.
Cummins engines are known for their durability, but they can be sensitive to pressure regulation issues. Two key points: - Are you also seeing a P1101 code alongside the P0087? - A similar issue in my experience required replacing the fuel relief valve—though it was not inexpensive. I’ve heard rumors that some technicians modify the valve with shims, but I haven’t personally tried this method and cannot confirm its effectiveness. Some Cummins enthusiasts recommend aftermarket 'relief valve kits' for improved performance or reliability. If you have a diagnostic scanner, consider monitoring fuel pressure—does the issue occur only under high load or after sudden demand? This could indicate that the relief valve is opening but then sticking open.