Description
New Pressure Sensor for Detroit Diesel Engines, Part Number A4721531028
Why Choose This Detroit Diesel Pressure Sensor From HHP?
- Brand new construction built to OEM specifications for proper fitment and function
- Manufactured in an ISO 9001:2015 certified facility for quality and consistency
- Crafted with hard-wearing strength and durability to handle the demands of daily heavy duty operation
- No core charge required
- Backed by a 1 Year Warranty from HHP
- Cross references 3FL006, 4721531028, A4721531028, DDE 4721531028, DDE A4721531028, DDE4721531028, and DDEA4721531028
- Fits Detroit Diesel ALL engine families
Why Pressure Sensor Failures on Detroit Diesel Engines Cannot Wait
Pressure sensors are among the most important data-gathering components in a modern Detroit Diesel engine. Each sensor is responsible for monitoring a specific pressure circuit and transmitting that reading in real time to the engine control module. The ECM depends on this continuous stream of accurate data to manage fuel delivery, turbocharger operation, exhaust aftertreatment system function, and engine protection protocols. Without reliable pressure data, the ECM is effectively flying blind, making decisions based on information that no longer reflects what is actually happening inside the engine.
When a pressure sensor begins to drift from its calibrated range, stick at a fixed reading, or fail outright, the consequences depend on which circuit it is monitoring but are consistently harmful. A failing boost pressure sensor can cause the ECM to miscalculate fueling, leading to power loss, excessive black smoke, or poor throttle response. A faulty oil pressure sensor can mask dangerously low lubrication conditions that would otherwise trigger a protective engine shutdown, putting bearings, journals, and other critical internal components at risk of serious damage. A malfunctioning exhaust backpressure sensor can disrupt DPF regeneration cycles, contribute to soot loading faults, and push the engine into derate before the root cause is ever correctly identified.
At $151.19 with no core charge and same-day shipping, replacing a failed pressure sensor on a Detroit Diesel is one of the lowest cost, highest impact repairs available. A new sensor closes the gap between what the ECM thinks is happening and what is actually happening, restores accurate data to every system that depends on it, and protects far more expensive components from the consequences of operating on bad information.
About This Detroit Diesel Pressure Sensor
This is a brand new pressure sensor, HHP part number A4721531028, engineered as a direct fit replacement for Detroit Diesel engines across all engine families listed under the Detroit Diesel ALL designation. It cross references OEM and aftermarket part numbers 3FL006, 4721531028, A4721531028, DDE 4721531028, DDE A4721531028, DDE4721531028, and DDEA4721531028. If your existing sensor carries any of these numbers, this unit is the correct replacement.
This is one of the most compact parts HHP carries, weighing just 0.26 lbs and shipping in a 3.42 by 1.24 by 1.24 inch package, so it moves through the shipping network quickly regardless of your location. There is no core charge on this sensor, meaning no deposit is required and nothing needs to be returned after installation. Because diesel engine parts are engine specific, entering your Engine Serial Number or VIN on the product page before ordering allows HHP’s team to verify fitment for your specific Detroit Diesel application before the part ships, helping you avoid the cost and delay of an incorrect order.
Get Your Detroit Diesel Pressure Sensor From Highway and Heavy Parts
At $151.19 with no core charge, a 1 Year Warranty, and same-day shipping on in-stock orders placed by 2PM EST, this is a fast and cost-effective repair for any Detroit Diesel experiencing pressure sensor related fault codes, derate conditions, or performance issues tied to inaccurate pressure data. HHP’s ASE certified technicians are on staff to help you identify which pressure circuit is the source of the problem, confirm fitment, and answer any installation questions before and after your purchase.
Order your Detroit Diesel Pressure Sensor (A4721531028) from HHP today.
Frequently Asked Questions About Detroit Diesel Pressure Sensor (A4721531028)
1. What engines does pressure sensor A4721531028 fit?
This sensor is built for Detroit Diesel engines across all engine families listed under the Detroit Diesel ALL designation. HHP recommends submitting your Engine Serial Number or VIN before ordering so our team can confirm this is the correct sensor for your specific Detroit Diesel application before the part ships.
2. What OEM part numbers does A4721531028 replace?
This pressure sensor cross references 3FL006, 4721531028, A4721531028, DDE 4721531028, DDE A4721531028, DDE4721531028, and DDEA4721531028. If your existing sensor carries any of these numbers, this is the correct replacement.
3. Is this pressure sensor new or remanufactured?
This is a brand new pressure sensor manufactured in an ISO 9001:2015 certified facility to meet OEM specifications and tolerances. It is not remanufactured, reconditioned, or rebuilt.
4. What does a pressure sensor do on a Detroit Diesel engine?
A pressure sensor monitors a specific pressure circuit within the engine or aftertreatment system and transmits real-time readings to the ECM. Depending on its location, it may track boost pressure, oil pressure, fuel rail pressure, or exhaust backpressure. The ECM uses this data to regulate fueling, turbocharger function, DPF regeneration cycles, and engine protection systems. Accurate pressure data is essential for the engine to perform safely and efficiently.
5. What are the symptoms of a failing pressure sensor on a Detroit Diesel?
Common symptoms include active fault codes related to pressure circuit signal range or performance, engine derate or reduced power output, poor throttle response, rough or inconsistent performance under load, irregular turbocharger behavior, unexpected regen failures or soot loading faults, and in some cases warning lights related to oil pressure or boost pressure. The specific symptoms depend on which circuit the failed sensor is monitoring.
6. Can a faulty pressure sensor cause serious engine damage on a Detroit Diesel?
Yes. A failed oil pressure sensor is the most serious example, as it can mask a genuine low oil pressure condition that would otherwise trigger a protective engine shutdown. If the ECM does not receive an out-of-range oil pressure signal, the engine continues to run without adequate lubrication, which can cause rapid and severe damage to bearings, journals, and other internal components. Replacing a failed sensor promptly is far less costly than addressing the damage a missed shutdown can cause.
7. Is there a core charge on this pressure sensor?
No. This Detroit Diesel pressure sensor carries zero core charge. There is no deposit required at checkout and nothing to return after the installation is complete.
8. What warranty comes with this pressure sensor?
HHP backs this Detroit Diesel pressure sensor with a 1 Year Warranty covering quality and fitment from the date of purchase.
9. How fast will this sensor ship?
In-stock orders placed by 2PM EST ship the same day, Monday through Friday. The sensor weighs just 0.26 lbs and ships in a 3.42 by 1.24 by 1.24 inch package via UPS or FedEx, making it one of the quickest parts to arrive regardless of your location.
10. Can HHP help me identify which pressure sensor circuit is causing my fault codes before I order?
Yes. HHP has ASE certified technicians on staff who can review your fault codes and engine information to help pinpoint which pressure circuit is failing and confirm that part number A4721531028 is the correct replacement sensor for your Detroit Diesel application before your order is placed.
