Fuel Rail/System Pressure - Too Low
What does POWERSTROKE-P0087-67 mean?
The POWERSTROKE-P0087-67 (Power Stroke) diesel fault code means: Fuel Rail/System Pressure - Too Low. This is a moderate severity code.
Common Symptoms
- Hard start or no start
- Loss of power / limp mode
- CEL
- Metal debris in fuel rails (if CP4 has grenaded)
Probable Causes (Ranked by Likelihood)
- CP4 high-pressure fuel pump failure (catastrophic on 6.7L, 2011-2019) Very Likely
- Plugged fuel filter Likely
- Failed fuel pressure sensor Likely
- Leaking fuel injector (returning excess fuel) Possible
Step-by-Step Diagnostic Procedure
DO NOT start the engine if you suspect CP4 failure -- metal debris will destroy all 8 injectors + rails.
Pull the fuel filter housing drain and inspect for metallic glitter / debris.
Scan fuel rail pressure PID vs commanded -- CP4 failures show actual unable to reach commanded under load.
If debris confirmed, the job is: CP4 pump + both rails + all 8 injectors + lines flush ($8,000-$15,000).
Consider CP3 conversion kit as part of the rebuild to prevent recurrence.
Common Fixes by Vehicle
What techs usually find when diagnosing POWERSTROKE-P0087-67 on specific platforms:
P0087 on the 6.7L Scorpion is the Bosch CP4.2 pump failure -- same catastrophic mode as the Duramax LML. When the CP4 fails, metal grinds through the entire fuel system. Do NOT drive the truck. Full replacement at a dealer runs $8,000-$14,000. S&S Diesel Motorsport and other vendors offer CP3 conversion kits ($3,500-$5,500) which are the permanent fix most 6.7L owners pursue. Catch-can kits do NOT prevent failure.
Labor: 10-14 hours (full system) Common fix part S&S CP3 Conversion Kit (6.7L) View on Amazon→Frequently Asked Questions
What causes CP4 failure on the 6.7 Power Stroke?
The Bosch CP4.2 pump used on 2011-2019 6.7L trucks has marginal self-lubrication. When fuel lubricity is poor or the cam follower slips, the cam scuffs into the pump body and sends metal downstream. US diesel fuel lubricity is on the low side of what the pump was designed for.
How do I know if my CP4 has grenaded?
Drain the fuel filter housings and inspect for metallic glitter under a magnet. If metal is present, assume the pump failed and do NOT restart the engine -- every crank pushes more debris into the injectors.
Is a CP3 conversion worth it?
Most owners doing a CP4 repair install a CP3 conversion at the same time. It adds $1,000-$2,000 to an already $8,000+ repair and is widely considered permanent prevention. It does require a tuner/programmer.