Yanmar 3TNV88C, 4TNV86CT, 4TNV88C, 4TNV98CT DPF Pressure Sensor | Yanmar 129978-17700 New
New Yanmar 129978-17700 pressure sensor for the diesel particulate filter (DPF). Yanmar’s parts catalogs list it as SENSOR, PRESSURE in the DPF group, one per engine, on the 3TNV88C-KKEV, 4TNV86CT-DTR, 4TNV88C-DHQ, 4TNV88C-DSA and 4TNV98CT-NEN builds.
On the 4TNV86CT-DTR and 4TNV88C-DHQ it replaced the earlier 129A00-17702 sensor. Yanmar notes that the ECU software must be updated with the designated service tool when this part is replaced.
Confirm Fitment Before You Order
Call 530-668-0818 with your VIN or engine serial number and we will confirm it is the right part before anything ships.
Specifications
| Part number | 129978-17700 |
|---|---|
| Brand | Yanmar |
| Condition | New |
| Yanmar part name | SENSOR, PRESSURE |
| Location | Diesel particulate filter (DPF) group |
| Quantity per engine | 1 |
| Yanmar service note | Update the ECU software with the designated service tool when replacing |
| Shipping weight | 1 lb |
Fits / Applications
- Yanmar 3TNV88C (3TNV88C-KKEV build): DPF group, one per engine
- Yanmar 4TNV86CT (4TNV86CT-DTR build, from engine serial E01313): DPF group, one per engine
- Yanmar 4TNV88C (4TNV88C-DSA build, and 4TNV88C-DHQ from engine serial E03154): DPF group, one per engine
- Yanmar 4TNV98CT (4TNV98CT-NEN build): DPF group, one per engine
Replaces 129A00-17702 on the 4TNV86CT-DTR (from engine serial E01313) and the 4TNV88C-DHQ (from E03154). Yanmar marks the change N: 129978-17700 can be used in place of 129A00-17702, but 129A00-17702 cannot be used in place of 129978-17700.
Frequently Asked Questions
Does 129978-17700 replace 129A00-17702?
On the 4TNV86CT-DTR and 4TNV88C-DHQ, yes. Yanmar lists 129978-17700 in place of 129A00-17702 from engine serials E01313 and E03154 and marks the change N: the new sensor can be used in place of the old one, but not the other way around.
Does the ECU need anything after the sensor is replaced?
Yes. Yanmar’s catalogs note that the ECU software must be updated with Yanmar’s designated service tool when this part is replaced. See the service manual for details.
Is 129978-17700 the same as 129978-12700?
No. Both are Yanmar pressure sensors, but Yanmar lists 129978-12700 in the cylinder head and bonnet group and 129978-17700 in the DPF group.
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