Manufacturer-specific powertrain code (varies by make: e.g., fuel-pump pressure / injector)
The P3187 code means the vehicle's onboard diagnostic system has detected: Manufacturer-specific powertrain code (varies by make: e.g., fuel-pump pressure / injector). This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- hard
- Estimated cost
- Varies — depends on the specific component this manufacturer-specific code points to on your vehicle. Diagnose before buying parts.
Manufacturer-specific code. P3187 is a manufacturer-specific DTC, so its exact definition can differ by make, model, and year. Use the meaning above as a general guide, and always confirm it against your vehicle manufacturer's official service information (or a make-specific scan tool) before diagnosing or replacing parts.
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Common Symptoms
- Check Engine or a related warning light on
- Exact symptoms depend on the specific system this code covers for your make
- A make-specific scan reveals which subsystem and circuit is involved
Probable Causes (Ranked by Likelihood)
- A fault in the specific component or circuit this code monitors (the exact part varies by manufacturer) High
- Damaged wiring, a corroded connector, or a poor ground in that circuit Moderate
- A related sensor or control module reporting or causing the fault Moderate
Step-by-Step Diagnostic Procedure
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Confirm your exact make, model, and year first — P3187 is manufacturer-specific and can mean different things across brands.
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Read P3187 with an enhanced/make-specific scan tool and check your manufacturer's official service information for the precise definition and procedure.
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Inspect the wiring, connectors, and grounds for the indicated circuit before replacing any part.
Common Fixes by Vehicle
What techs usually find when diagnosing P3187 on specific vehicles — tap your vehicle for the fix and the exact part:
2005-2012 Honda Accord V6 3.5L Moderate DIY
P3187 fuel system performance Bank 2 on Honda V6 engines typically indicates a failing VCM (Variable Cylinder Management) system or a weak fuel pump. Start by monitoring fuel trims on Bank 2 with a scan tool -- if LTFT is +15% or higher, replace the fuel pump. Also check Bank 2 injectors for leak-down after VCM deactivation cycles.
Labor: 2-3 hours2007-2013 Nissan Titan/Armada 5.6L Moderate DIY
On the VK56 5.6L V8, P3187 Bank 2 fuel trim issues often trace to a clogged fuel filter (integral with the in-tank pump), or cracked intake plenum gaskets causing lean Bank 2. Smoke-test the intake first. If no leaks, replace the fuel pump module assembly.
Labor: 2-3 hours2008-2014 BMW N63 Twin Turbo V8 Advanced DIY
N63 engines set P3187 when the Bank 2 HPFP is weak or fuel pressure drops under load. BMW extended warranty covered HPFP replacements up to 120K miles under the Customer Care Package. Test rail pressure with ISTA/D -- should hit 200 bar under load. Replace HPFP on Bank 2 if pressure sags.
Labor: 4-6 hoursFrequently Asked Questions
Does P3187 mean the same thing on every vehicle?
No. P3187 is a manufacturer-specific diagnostic trouble code, so its exact meaning varies by make, model, and year. Always confirm it against your vehicle manufacturer's service information before diagnosing or replacing parts.
What does P3187 most likely indicate?
Manufacturer-specific powertrain code (varies by make: e.g., fuel-pump pressure / injector). Treat this as a general guide and verify the specifics for your vehicle.
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