NUMBER: 18-090-15
GROUP: Vehicle Performance
DATE: November 21, 2015
SUBJECT:
P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1
OVERVIEW:
This bulletin involves verifying the proper operation of the Diesel Exhaust Fluid (DEF) system and, if necessary, replacing the Selective Catalyst Reduction (SCR) Catalyst assembly.
MODELS:
| 2011 – 2012 | (DD) | Ram 3500 Cab Chassis |
| 2011 – 2012 | (DP) | Ram 4500\5500 Cab Chassis |
NOTE: This bulletin applies to vehicles equipped with a 6.7L diesel engine (sales code ETJ or ETK).
SYMPTOM/CONDITION:
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find Diagnostic Trouble Code (DTC) P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1 set in the Powertrain Control Module (PCM) memory.
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all vehicle systems are functioning as designed. If DTCs other than the ones listed above are present record them on the repair order and repair as necessary before proceeding further with this bulletin.
If the customer describes the symptom/condition listed above or if the technician finds the DTC, perform the Repair Procedure.
PARTS REQUIRED:
| Qty. | Description | Part No. |
|---|---|---|
| 1 (AR) | Converter, SCR Catalyst | 52014079AL |
| 1 (AR) | Converter, SCR Catalyst | 52122429AK |
| 1 (AR) | Gasket, Injector | 68087326AA  |
| 1 (AR) | Gasket, Flange | 68065844AA |
REPAIR PROCEDURE:
- Raise the vehicle on a suitable hoist and inspect all DEF hoses and hose connections for leaks or restrictions.
NOTE: Diesel exhaust fluid will form white deposits around leaky fittings.
- Was any exhaust fluid leaks found?
- Yes >>> This bulletin does not apply. Repair the fluid leak, using normal repair procedure in TechConnect and follow current warranty guidelines.
- No >>> Proceed to Step #3.
- Test the flow of the DEF injector by performing the following steps:
- Remove the DEF Injector from the decomposition tube, leaving the electrical connector plugged in and injector connected to the supply hose.
- Place the injector into a suitable container to capture the fluid that is sprayed during the injector quantity test.
- Using the wiTECH, perform the “DEF Reductant Doser Pump Override” test locatedin the PCM “System Tests”.
- Measure the amount of fluid sprayed after the test times out.
NOTE: This Test will run for six minutes before timing out. The amount of flow may fluctuate throughout the test, therefore the test must be allowed to run completely in order for the results to be accurate. The fluid should spray out as a mist. There should be no dripping from the holes in the DEF Injector at any time during the duration of the test procedure.
NOTE: Also, an injector may have white deposits on the tip that would appear to block the holes. These deposits are dry urea, they do not impact the injector performance and will wash off as soon as the injector is actuated. DO NOT replace the injector without running the bucket test first.
NOTE: During testing some residual fluid may collect on the DEF Injector. Do not replace an Injector for that reason alone. Run the entire volume flow test to determine a course of action.
- Was the amount of fluid captured between 85 ml and 115 ml (2.87 oz and 3.88 oz)?
- Yes >>> Proceed to Step #5.
- No >>> This bulletin does not apply. Further diagnosis of the DEF system is required.
- Test and inspect the DEF fluid for signs of contamination. Refer to detailed service procedures available in DealerCONNECT/TechCONNECT, Service Info Section 25 Emissions Control> Diesel Exhaust Fluid Emissions> Diagnosis And Testing> DIAGNOSIS AND TESTING – DIESEL EXHAUST FLUID. If found, repair as necessary following normal warranty repair guidelines.
NOTE: DEF fluid dilution or contamination is not covered under normal warranty.
- Were there any signs of DEF fluid contamination found?
- Yes >>> This bulletin does not apply. Repair the source of the contamination as needed per current warranty repair guidelines.
- No >>> Proceed to Step #7.
- Replace the SCR catalyst. Refer to detailed service procedures available in DealerCONNECT/TechCONNECT, Service Info Section 11- Exhaust System> Catalyst, Selective Catalytic Reduction (SCR)> Removal/Installation.
- Following all applicable published service bulletins, verify the PCM software is up to date.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
| Labor Operation No: | Description | Skill Category | Amount |
| 11-50-01-9N | Test DEF System Only (2 – Skilled) | 10 – Diesel | 0.6 Hrs. |
| 11-50-01-9P | Test DEF System And Replace SCR Catalyst (2 – Skilled) | 10 – Diesel | 1.5 Hrs. |
| 11-50-01-9T | Test DEF System And Replace SCR Catalyst (With Transfer Case Skid Plate, Sales Code XEF) (2 – Skilled) | 10 – Diesel | 1.8 Hrs. |
FAILURE CODE:
| ZZ | Service Action |
18-090-15
18-090-15
- One gallon of is used approximately every 300 miles
- A truck with a 20 gallon DEF tank can go up to 6000 miles between fill-ups
- When used in an SCR system will reduce the levels of NOx emissions of those engines
- Includes a 330 Gallon Tote System
- Featuring a Non Toxic Solution of 67.5-Percent Purified Water and 32.5-Percent Ultra Pure Automotive Grade Urea
- Meets ISO Standards 22241 for Purity and Composition
- An American Petroleum Institute (API) Certified Diesel Exhaust Fluid
- Improve Fuel Economy By Up To Five Percent While Reducing Exhaust Emissions
- One gallon of is used approximately every 300 miles
- A truck with a 20 gallon DEF tank can go up to 6000 miles between fill-ups
- When used in an SCR system will reduce the levels of NOx emissions of those engines
- Mixture of 32.5 percent high purity synthetic urea and 67.5 percent deionized water
- Helps convert nitrogen oxide into harmless nitrogen gas and water vapor for cleaner emissions
- Improves fuel economy by up to 5 percent
- Inject the fluid into your exhaust stream with a specialized dosing module
- Stable, colorless, odorless, and meets ISO standards 22241 for purity and composition
- Meets GM Original Equipment specifications to be approved for use in GM vehicles as well as in non-GM diesel vehicles that have an SCR (Selective Catalytic Reduction) system to meet regulated NOx emissions
- High quality formula is made from high purity urea and deionized water. It contains no chemical additives or other components that could cause SCR system failure
- Includes vented nozzle(s) that make pouring easy by helping to prevent glugging
- Has 1 complimentary nozzle. Extra nozzles sold separately
- This item does NOT ship free to residential, home business or farm addresses, please scroll down to confirm shipping details prior to purchase.
- SINOPEC Galance Aqueous Urea Solution AUS 32 is a API certified Diesel Exhaust Fluid. It is formulated using high purity urea and water. This product is a 32.5% solution designed for use in car and truck diesel engines with SCR technology. That is clear, non-toxic and safe to handle. Shelf life: 2 years.
- Pack Size: 55 Gallon Drum
Last update on 2021-10-26 / Affiliate links / Images from Amazon Product Advertising API
Last update on 2021-10-26 / Affiliate links / Images from Amazon Product Advertising API
