Multiquip 8981867621 DOC Temp Sensor Rear

The Multiquip 8981867621 is a genuine OEM DOC Temp Sensor Rear designed for DCA-series super-silent and ultra-silent generators including the DCA125SSIU4F, DCA400SSI4F, DCA400SSI4F3, DCA400SSI4F3PB, DCA400SSI4F3PD, DCA70SSIU4F, and related Tier 4 variants. As a direct Multiquip OEM component, 8981867621 is manufactured to the exact specification of the original sensor, ensuring accurate temperature monitoring within the diesel oxidation catalyst system. This part is confirmed to fit the DCA generator families listed above, making it a straightforward, no-guesswork replacement for service technicians and fleet operators. When your generator's emissions system flags a fault or sensor failure, sourcing the correct OEM part like the Multiquip 8981867621 is the fastest path back to compliant, reliable operation.

Key Features

• Genuine OEM Temperature Accuracy — Manufactured to the precise resistance and output specification required by the DOC exhaust aftertreatment system, ensuring the ECU receives accurate rear catalyst temperature readings.
• Direct-Connect Replacement — Matches the original sensor connector, thread pitch, and mounting position for a straightforward swap on DCA Tier 4 generator platforms.
• Broad DCA Series Fitment — Confirmed for DCA125SSIU4F, DCA400SSI4F, DCA400SSI4F3, DCA400SSI4F3PB, DCA400SSI4F3PD, DCA70SSIU4F, and 60Hz variants.
• Emissions System Integrity — A correctly functioning rear DOC temp sensor is essential for Tier 4 compliance; a failed sensor can trigger fault codes, derate the generator, or force an unplanned shutdown.
• Critical Safety and Compliance Function — Proper rear exhaust temperature data protects against DOC overtemperature conditions and supports safe, regulation-compliant generator operation on monitored job sites.

The DOC Temp Sensor Rear monitors exhaust gas temperature at the outlet of the diesel oxidation catalyst, a core component of the Tier 4 emissions aftertreatment system fitted to DCA-series generators. The engine control unit uses this temperature signal to verify that the DOC is operating within its correct thermal window — too low and the catalyst cannot efficiently oxidize hydrocarbons and carbon monoxide; too high and risk of component damage increases. When this sensor fails or reads out of range, the generator's ECU will typically log a fault code and may reduce output or shut down entirely to protect the aftertreatment system, making prompt replacement with the correct OEM part essential to keeping the unit in service and in compliance.

For questions about fitment or to confirm compatibility with your specific DCA generator serial number, contact the DHS Equipment parts team directly.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.