Description
If you’re experiencing hard starts, sluggish throttle response, reduced power, or fault codes on your L5P Duramax, the culprit is often a failing or misreading fuel rail pressure sensor. The GM 12686809 sensor is a direct OEM replacement designed to restore accurate fuel pressure readings to the ECM and resolve drivability issues.
Common Symptoms of a Faulty Sensor:
– Hard starts or long crank times
– Poor fuel economy
– Check engine light with fuel pressure DTCs
– Limp mode or reduced power
– Inconsistent throttle or idle issues
This sensor reads high-pressure fuel levels in the rail and sends that data to the ECM, which controls injector timing and flow. Faulty readings can trigger safety limits and poor performance.
Pro Tip: Wiring issues are also common in this circuit. If replacing the sensor doesn’t resolve the issue, inspect or replace the pigtail harness.
Features:
– Genuine OEM-quality fit and function
– Direct bolt-on replacement
– No tuning or modification required
Direct Fit for:
2017–2023 Chevrolet Silverado 2500HD / 3500HD (6.6L L5P Duramax)
2017–2023 GMC Sierra 2500HD / 3500HD (6.6L L5P Duramax)
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