NEW BOSCH FUEL CONTROL ACTUATOR (MPROP) FOR 2006-2010 GM DURAMAX 6.6L LBZ LLY CP3 PUMP 0928400673
Restore optimal fuel delivery and injection timing with this brand-new Bosch Fuel Control Actuator (MPROP) designed for 2006–2010 GM 6.6L Duramax engines equipped with the Bosch CP3 injection pump. The MPROP (Metering Proportional Valve) plays a crucial role in precisely regulating fuel pressure inside the CP3, ensuring proper combustion and maximizing efficiency. The function of the fuel control actuator is to control the output pressure of the high pressure CP3 fuel pump. When the part fails, the actual fuel pressure will not match the desired fuel pressure as specified by the engine computer. Both pressures can be monitored on a scan tool and compared. The most common symptom as the part begins to fail is varying / unstable idle. The MPROP is mounted on the back side of the CP3 pump and is attached by (3) T-25 Torx head screws. Two O-rings seal the MPROP to the pump and are included already installed on the new part.
This is a genuine OEM Bosch actuator, not a knockoff or remanufactured unit—ensuring OE fitment, performance, and longevity.
What’s Included in the Kit:
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1 × Brand New Bosch Fuel Control Actuator (MPROP)
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1 × Factory O-Ring Seal (pre-installed)
Features & Benefits:
- OEM Bosch Quality: Manufactured by Bosch (Part #0928400673) – the original supplier
- Improves Idle Stability: Resolves rough idle, hard starting, or surging issues
- Restores Proper Fuel Pressure: Helps correct low rail pressure or P0087/P1093 DTC codes
- Plug-and-Play Installation: Direct fit for CP3 fuel injection pump—no tuning required
- Cost-Effective Fix: Common resolution for fueling inconsistencies and injector feed problems
- Compatible with Tuned and Stock Trucks: Suitable for performance builds or daily drivers
Compatibility:
Fits the following GM/Chevrolet Duramax applications equipped with the Bosch CP3 pump:
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2006–2007 Chevrolet Silverado 2500HD / 3500 (LLY / LBZ)
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2006–2007 GMC Sierra 2500HD / 3500 (LLY / LBZ)
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2007.5–2010 Chevrolet Silverado & GMC Sierra 2500HD / 3500 (LMM w/ CP3 conversion only)
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2006–2010 Chevy Kodiak / GMC TopKick with 6.6L Duramax
Note: Fits only engines with a Bosch CP3 high-pressure fuel pump. Will not fit LML engines with CP4 pumps without modification or conversion.
Common DTC Codes Solved by Replacing MPROP:
• P0087 – Fuel Rail/System Pressure Too Low
• P1093 – Fuel Rail Pressure Low During Power Enrichment
• Hard Starting or Extended Cranking
• Rough Idle, Surging, or Low Power
Installation Note:
The MPROP is mounted to the rear of the CP3 injection pump and is accessible from the driver’s side. Clean area around the valve before removal to prevent contamination. Re-torque retaining screws to factory spec.
Shipping Disclaimer:
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✔️ Expedited shipping options are available at checkout.
✔️ Orders are processed within 1 business day (Monday–Friday).
✔️ Orders placed on weekends or holidays will be processed on the next business day.
✔️ Tracking information will be provided once the item ships.
✔️ Shipping to PO Boxes, APO/FPO may be limited based on carrier restrictions.
California Proposition 65 Warning:
This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
- DTC P0087 Fuel Rail Pressure (FRP) Too Low
- DTC P0088 Fuel Rail Pressure (FRP) Too High
- DTC P0089 Fuel Pressure Regulator Performance
- DTC P0090 Fuel Pressure Regulator Control Circuit
