Description
PAI 650620 is a brand-new (no-core) aftermarket inlet NOx sensor that replaces Detroit A0101532228 / EA0101532228 on DD15 engines equipped with SCR/DEF aftertreatment. Mounted upstream of the SCR catalyst, the sensor measures engine-out NOx so the ECM can meter DEF dosing closed-loop. Built with a 4-pin rectangular connector, M20 x 1.5 thread, 17.25 in. lead, and 23.88 in. overall length to match the OEM service envelope.
Signs You Need a New Inlet NOx Sensor
- SPN 3216 (NOx inlet) or SCR efficiency fault codes active
- Check Engine / MIL with NOx conversion or DEF dosing fault
- Engine derate or 5 mph limp mode tied to NOx-related fault
- Excessive DEF consumption or DEF dosing irregularity
- Repeated forced regens or aftertreatment efficiency fault on diagnostics
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 650620 |
| Part Type | NOx Sensor — Inlet (Pre-SCR / Upstream), New (No Core) |
| Engine Compatibility | Detroit Diesel DD15 with SCR/DEF |
| Connector | 4-pin rectangular |
| Thread | M20 x 1.5 (with compound grease) |
| Lead Length | 17.25 in. |
| Overall Length | 23.88 in. |
Cross References
This part replaces or is equivalent to the following part numbers:
- Detroit Diesel: A0101532228, EA0101532228, 0101532228
- Continental / VDO: 5WK97338A
- PAI Industries: 650620
- Also known as: A0101532228002, GA31228
Applications
This inlet NOx sensor fits the following engines:
- Detroit Diesel DD15 14.8L (with SCR/DEF aftertreatment)
Representative vehicles using these engines:
- Freightliner Cascadia with DD15 (2012-present)
- Western Star 4700 / 4900 / 5700XE with DD15 (2016-present)
- Freightliner Columbia / Coronado with DD15
Verify your engine serial number, SCR system configuration, and connector style before ordering to confirm fitment.
