JCB QLS Head Unit : OEM 320/D9238
JCB QLS HEAD UNIT : OEM 320/D9238
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a New, Tamerx QLS Head Unit, Tamerx part number 320/D9238TX ( OEM Part Number 320/D9238 ). This part is primarily made for a JCB , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 320/D9238 |
| Additional OEM | 320/B9364, 320/D9238 |
ADDITIONAL DETAILS
| CONDITION | New |
| UPC / Barcode | 00840490542136 |
| WEIGHT | 5.00 LBS |
SHIPPING OPTIONS
Ship Weight : 5.00 LBS
UPS Ground, 2nd Day Air, Next Day Air
SHIPPING POLICY
Tamerx Diesel Products 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 Tamerx Diesel Products 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.
Tamerx Diesel Products 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 Tamerx Diesel Products, 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). Tamerx Diesel Products 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 Tamerx Diesel Products, 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.
The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.
The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.
All fluids must be drained.
If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.
Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.
The JCB QLS Head Unit OEM 320/D9238 is a genuine factory component designed to ensure proper Diesel Exhaust Fluid (DEF) system operation in JCB equipment. Manufactured to JCB’s precise OEM standards, this unit provides accurate fitment and reliable functionality across a range of industrial and construction applications. By maintaining correct DEF system performance, it helps support emissions compliance and consistent engine efficiency. Built with durable materials, it is engineered to withstand the harsh operating conditions typical of heavy equipment use, delivering long-lasting service life. For operators and fleet managers, this head unit offers OEM-certified quality and dependable reliability that keeps JCB machines running smoothly.
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On JCB machines using the QLS (Quick Liquid Sensing) system, the Head Unit with OEM part number 320/D9238 is a crucial sensor module mounted on the Diesel Exhaust Fluid (DEF) tank (or AdBlue tank). Its central role is to monitor and report the condition of the DEF so the engine’s aftertreatment system can dose fluid correctly and protect the SCR system.
Core Role & Functions
- Fluid Level Monitoring
- The head unit senses how much DEF remains in the tank and signals when levels are getting low.
- Temperature Sensing
- It tracks fluid temperature to detect freezing or overheating that could damage the system or prevent proper dosing.
- Quality / Concentration Sensing
- The unit helps confirm that the DEF mixture is within required concentration or purity limits.
- Signal & Communication Hub
- It relays all sensor data (level, temperature, quality) to the engine’s control unit (or Diesel Control Unit), enabling proper dosing, diagnostics, and fault handling.
- Protection for the SCR System
- By providing early warning of issues (low fluid, off-spec mixture, extreme temperature), it helps prevent damage or misoperation of the SCR and related components.
Because the JCB QLS Head Unit (320/D9238) integrates multiple sensing roles into one device, it’s essentially the “brain and sensor gateway” of the DEF tank. Without it, the SCR system would lack feedback and be unable to maintain clean operation or compliance.
The PM (Particulate Matter) soot sensor is a key component in modern diesel exhaust systems. It monitors soot levels in the exhaust stream and ensures that the Diesel Particulate Filter (DPF) is working correctly. When this sensor starts to fail, it can trigger warning lights, reduce efficiency, and lead to costly repairs if not diagnosed quickly.
Common Symptoms of a Faulty PM Soot Sensor
Before diagnosing, look for these warning signs:
- Check engine light or DPF warning light illuminated
- Frequent regeneration cycles or incomplete regens
- Increased fuel consumption
- Reduced efficiency or sluggish engine response
- Diagnostic trouble codes (DTCs) related to soot or DPF readings
Step-by-Step: How to Diagnose a Faulty PM Soot Sensor
- Scan for fault codes.
- Use a diagnostic tool to check for DTCs related to the soot sensor (common codes include P24A0, P24A2, or P24AE).
- Inspect the sensor and wiring.
- Check the harness and connectors for corrosion, damage, or loose fittings. The sensor operates in high-heat environments, making it prone to wear.
- Check for soot buildup.
- Remove the sensor and inspect the tip. Heavy soot deposits may interfere with readings and can sometimes be cleaned, depending on manufacturer recommendations.
- Monitor live data.
With a scan tool, compare soot sensor readings against known good values. If the sensor output is erratic, flatlined, or out of range, it’s likely failing. - Test voltage and signal.
Use a multimeter to confirm the sensor is receiving proper voltage and sending feedback to the ECU.
Diagnosing a faulty PM soot sensor requires a combination of visual inspection and electronic testing. If the sensor shows incorrect readings or repeated DPF-related codes, replacement is usually the most reliable solution. Addressing soot sensor issues early helps maintain emissions compliance and prevents costly DPF damage.
Exposure to contaminated DEF, extreme temperatures, or moisture can impact sensor accuracy.
It should be checked during regular DEF system maintenance intervals to ensure reliable operation.
Keeping the DEF tank clean and using high-quality DEF fluid helps prevent sensor contamination.
Yes, both freezing and overheating can interfere with DEF sensor readings and signal accuracy.
JCB QLS Head Units
