Paccar / Cummins DEF Sensor : OEM ASP60DS21-FG
PACCAR / CUMMINS DEF SENSOR : OEM ASP60DS21-FG
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured, DuraWRX DEF Sensor, DuraWRX part number ASP60DS21-FG ( OEM Part Number ASP60DS21-FG ). This part is primarily made for a Paccar / Cummins , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | ASP60DS21-FG |
| Additional OEM | ASP60DS21-FG, Q21-6039, Q21-6090, Q21-6127-001, Q21-6127-001K1T, Q21-6167-001, Q21-6167-001KIT, Q21-6170-001, Q21-6170-001K1T, Q21-6170-001KIT, Q216167-001 |
ADDITIONAL DETAILS
| CONDITION | New |
| UPC / Barcode | |
| WEIGHT | 3.00 LBS |
SHIPPING OPTIONS
Ship Weight : 3.00 LBS
UPS Ground, 2nd Day Air, Next Day Air
SHIPPING POLICY
Drive On Diesel ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Drive On Diesel only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.
The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.
Drive On Diesel provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.
Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".
If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.
As is the case for the majority of the diesel products sold on Drive On Diesel, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Drive On Diesel will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.
What is a Core Charge?
A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.
30 Day Core Charge Hold
You authorize Drive On Diesel, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.
"This Product Doesn't Have a Core"
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The DEF (Diesel Exhaust Fluid) Sensor, identified by OEM part number ASP60DS21-FG, is an integral part of the Selective Catalytic Reduction (SCR) system used in both Paccar and Cummins engine platforms. This sensor plays a crucial role in monitoring and reporting DEF tank conditions to the vehicle’s Electronic Control Unit (ECU), ensuring proper emissions system function.
Purpose and Function
The DEF sensor monitors:
- DEF Quality (Urea Concentration)
- Ensures the fluid meets the required 32.5% urea-to-water ratio.
- DEF Temperature
- Protects the system from overheating or freezing conditions.
- DEF Level
- Tracks remaining fluid volume in the tank to prevent dry-run errors.
This data is continuously transmitted to the engine control system, which uses it to regulate DEF dosing and maintain emissions compliance.
Key Features of OEM ASP60DS21-FG
- Multi-Sensor Integration
- Combines level, temperature, and quality sensors in one unit.
- CAN Communication Protocol
- Supports real-time diagnostics and system feedback.
- Compact Modular Design
- Allows easy fitment in DEF tank assemblies.
- Corrosion-Resistant Housing
- Built to withstand DEF’s chemical properties and extreme conditions.
Service and Replacement Notes
If you’re encountering dashboard alerts like “DEF Quality Poor” or “Service Emissions System”, this sensor could be at fault. Always verify compatibility using your VIN and confirm that you're sourcing a genuine OEM ASP60DS21-FG to avoid communication errors or misreadings.
The DEF (Diesel Exhaust Fluid) sensor monitors the fluid’s quality, level, and temperature—helping the SCR (Selective Catalytic Reduction) system operate correctly. When it fails, it can lead to engine derates, warning messages, or system shutdowns. Diagnosing a failed sensor requires a methodical approach.
Warning Signs of a DEF Sensor Failure
- DEF level reading stuck or incorrect
- Malfunction indicator lamp (MIL) or check engine light
- Diagnostic trouble codes (DTCs) related to SCR or DEF
- Sudden change in DEF usage patterns
- “Incorrect fluid detected” or “Poor quality DEF” messages
Steps to Diagnose a DEF Sensor Issue
- Retrieve fault codes
- Use a diagnostic scanner to pull stored DTCs. Look for codes like P203F, P206A, or P207F.
- Visual inspection
- Check the tank area for damage, crystallization, or loose wiring.
- Check wiring and connectors
- Look for corrosion, water intrusion, or pin damage.
- Test DEF quality
- Contaminated fluid can trigger false sensor readings.
- Review live data
- Compare actual vs. expected values from the sensor to spot inconsistencies.
Final Thoughts
Because many DEF sensors are integrated and non-serviceable, failure often means replacing the entire module. Addressing the issue quickly helps prevent costly downtime and emissions compliance problems.
It monitors the level, quality, and temperature of DEF in the tank to ensure proper SCR operation.