FITMENT
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2015-2025 Ford F-250 Super Duty 6.7L Powerstroke Diesel
- 2015-2025 Ford F-350 Super Duty 6.7L Powerstroke Diesel
- 2017-2019 Ford F-450 Super Duty 6.7L Powerstroke Diesel
- 2017-2019 Ford F-550 Super Duty 6.7L Powerstroke Diesel
Interchange Part Numbers:
DESCRIPTION
Product Overview
- The FC3Z-12B591-A was designed for the second-gen 6.7L’s tighter emissions parameters, with faster thermocouple response time and narrower accuracy tolerances than the earlier BC3Z-series sensors. The 2015+ PCM expects temperature updates at a higher refresh rate, and this sensor delivers.
- For F-450 and F-550 chassis cabs, note that this sensor only covers the 2017–2019 window. Ford revised the sensor network differently on the commercial chassis, so chassis cab owners with 2020+ trucks should verify their existing part number before ordering.
Key Features
- Thermal response curve precision-calibrated for modern ECU architectures. Built to satisfy the strict, high-refresh temperature sampling windows required for modern diesel emissions systems.
- The probe-to-body connection features deeper penetration welding and post-weld stress relief, eliminating the hairline fatigue fractures caused by intense, repeated underbody thermal cycling.
- Engineered with a rapid-response thermal element that tracks steep temperature rises during DPF regeneration without overshoot or measurement lag, preventing aborted regen cycles and ECU fault codes.
FAQ
Q: Why does this same part number apply to newer refreshed models alongside earlier years?
A: Ford’s platform refreshes primarily updated body styling and electronics, while carrying over the proven 6.7L Powerstroke exhaust and emissions architecture. Because the thermal requirement at this position remained unchanged, the FC3Z-12B591-A specification is the exact factory-designated component for both earlier and late-model trucks.
Q: How can I verify that live EGT sensor data is accurate after installation?
A: Perform a cold-soak check after the truck sits overnight. Before starting, all EGT sensors should read within a few degrees of ambient air temperature and match the Intake Air Temp (IAT) sensor. Once started, temperature readings should climb smoothly without sudden spikes or dropouts.
Q: Does the aluminum body on the 2017+ trucks affect EGT sensor life?
A: No. While underbody airflow characteristics differ on newer cab designs, EGT sensors are built specifically for extreme thermal cycling within the exhaust stream. Prolonged heat exposure during post-shutdown cooldown is fully accounted for in the sensor’s high-grade stainless construction.
Q: Can a failing EGT sensor pass OBD-II readiness checks while still causing regen problems?
A: Yes. Readiness monitors only check for electrical continuity and basic signal range—they cannot detect subtle calibration drift. A sensor reading 100°F–150°F lower than actual gas temperature will pass circuit checks, but will cause the ECU to under-fuel or abort active DPF regens, leading to soot accumulation without setting an immediate fault code.
Q: Need a different EGT position for your Super Duty?
A: Your 6.7L Powerstroke has several EGT positions. We carry the BC3Z-12B591-B (2011–2023), HC3Z-5J213-B (2017–2022), and AC3Z5J213C (2011–2016). Check your old sensor’s part number to grab the right match.
