NHTSA ID Number: 10213632
Manufacturer Communication Number: KC-2116
TSB/Document Date: 2022-06-07
Summary
NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions
6/1/22, 2:38 PM
Article
NOx Sensor Troubleshooting Guide - US10+OBD13
And Newer Emissions
Component Overview
There are two Nitrogen Oxide (NOx) sensors in the Exhaust Aftertreatment
System, an INLET and OUTLET. They are smart sensors reporting on the
DL7 (J1939-7) data link and they measure the INLET (Pre SCR) and
OUTLET (Post SCR) of NOx. The NOx sensors have unique CAN
identification numbers and cannot be swapped. Additionally these sensors
are not operational until the exhaust is up to operating temperature and free
of moisture. The Engine Control Module compares the INLET and OUTLET
NOx readings to evaluate the efficiency of the SCR.
The primary failure mode the NOx Sensors is internal failure, which will
generate a sensor specific fault code.
Diagnosis and Repair
Review the tables below to determine which category the Fault Code
currently being diagnosed falls under. Proceed according to the instructions
for the appropriate section.
INLET NOx Sensor (NOx 1) Diagnostic Trouble Codes - Sensor Failure
REPLACE the sensor if any codes in red below are active and/or
confirmed. Do not replace for inactive codes.
Fault
Code
P22FB-92
P220E-93
P2200-13
P2203-00
P2205-13
P2206-00
P2208-00
Fault Description
NOx Sensor Performance - Sensing Element Bank 1 Sensor 1,
Performance or Incorrect Operation
NOx Sensor Heater Control Circuit Range/Performance (Bank 1
Sensor 1), No operation
NOx Sensor Bank 1 Sensor 1, Circuit Open
NOx Sensor Circuit High Bank 1 Sensor 1
NOx Sensor Gas Outlet Open Circuit, Circuit open
NOx sensor heater control circuit low, bank 1 sensor 1
NOx sensor heater sense circuit, bank 1 sensor 1
; Live UI
Direction/Repair: Replace the sensor in accordance with Impact
1/6
6/1/22, 2:38 PM
Article
instructions.
Do NOT Cut the sensor wiring harness, all NOX sensors are currently on
mandatory return.
Inlet NOx Sensor (NOx 1) Diagnostic Trouble Codes - Potential Sensor
Failure
These codes in yellow below indicate that the inlet NOx sensor is potentially
damaged, but further investigation is required to verify sensor condition.
Fault Code
Fault Description
P026C-00
Fuel Injection Quantity Lower Than Expected
P026D-00
Fuel Injection Quantity Higher Than Expected
P2201-64
NOx Sensor Bank 1 Sensor 1, Signal plausibility failure
P225C-00 NOx Sensor Performance - Signal Stuck High Bank 1 Sensor 1
Direction: Run the applicable PTT Operation per OBD Level.
Emission
Level
OBD 1316
OBD 1718 VGT
Only
OBD 1718 TC
Only
PTT Operation
2549-08-03-03 Nox Conversion Test
2589-08-03-18 Exhaust Aftertreatment System Analysts (make
sure Nox Subtest is selected)
No test… Replace INLET (Nox 1) Nox Sensors if not replaced
within past 3 months and release truck. If Nox sensor has been
replaced within past 3 months open an E-Service Case.
2549-08-03-03 Nox Conversion Test
OBD 19
and
OR (whichever is available)
Newer VGT
Only
2589-08-03-18 Exhaust Aftertreatment System Analysts (only
Nox Subtest available)
OBD 19
and
2549-08-03-03 Nox Conversion Test
Newer TC
Only
; Live UI
2/6
6/1/22, 2:38 PM
Article
Repair:
• If the INLET (NOx1) sensor fails the evaluation, replace the Inlet NOx
Sensor ONLY.
• If the NOx2 sensor (Outlet NOx Sensor) fails the test, disregard the
results.
OUTLET NOx Sensor (NOx 2) Diagnostic Trouble Codes Sensor Failure
REPLACE the sensor if any codes in red table below are active and/or
confirmed. Do not replace for inactive codes.
Fault Code
Fault Description
P220F-93
NOx Sensor Incorrect Value at Startup, No operation
P229E-13
NOx Sensor Bank 1 Sensor 2, Circuit open
P22A6-00
NOx sensor heater sense circuit, bank 1 sensor 2
P22A1-00
NOx Sensor Circuit High Bank 1 Sensor 2
P22A3-13
NOx Sensor Heater Control Bank 1 Sensor 2, Circuit open
P22A4-00
NOx sensor heater control circuit low, bank 1 sensor 2
P22FE-00 NOx Sensor Performance - Sensing Element Bank 1 Sensor 2
Direction/Repair: Replace the sensor in accordance with Impact instructions.
Do NOT Cut the sensor wiring harness, all NOX sensors are currently on
mandatory return.
Outlet NOx Sensor (NOx 2) Diagnostic Trouble Codes Potential Sensor Failure
Fault Code
Fault Description
P225E-00 NOx Sensor Performance - Signal Stuck High Bank 1 Sensor 2
Direction: Run the applicable PTT Operation per OBD Level.
Emission
PTT Operation
Level
OBD 132549-08-03-03 NOx Conversion Test
16
OBD 172589-08-03-18 Exhaust Aftertreatment System Analysts (make
18 VGT
sure NOx and SCR Subtest are selected)
Only
OBD 17- No test… Replace Outlet (NOx 2) NOx Sensors if not replaced
UI
; Live18
TC
within past 3 months and release truck. If NOx sensor has been
Only
replaced within past 3 months open an E-Service Case
3/6
6/1/22, 2:38 PM
Article
Only
OBD 19
replaced within past 3 months open an E-Service Case.
and
Newer VGT
Only
2549-08-03-03 NOx Conversion Test
OR (whichever is available)
2589-08-03-18 Exhaust Aftertreatment System Analysts (only
Nox Subtest available)
OBD 19
and
Newer TC
Only
2549-08-03-03 NOx Conversion Test
Repair:
• If the Outlet (NOx 2) sensor fails the evaluation, replace the Outlet NOx
Sensor ONLY.
• If the NOx 1 sensor (Inlet NOx Sensor) fails the test, disregard the
results.
Diagnostic Trouble Codes With NOx Sensor in the Description
Direction/Repair: DO NOT REPLACE the NOx sensor(s) for these codes.
Diagnostics should be performed using PTT Diagnostics and the comment
section in the table below.
Fault
Code
P220A-1C
P220B-1C
Fault Description
Comments
NOx Sensor Supply Voltage Circuit (Bank 1
Sensor 1), Circuit voltage out of range
NOx Sensor Gas Outlet High Voltage, Circuit
voltage out of range
Power
supply
Power
supply
Sensor
reading fresh
air
Sensor
reading fresh
air
Most likely
Harness
Issue
Most likely
Harness
Issue
P225D-00
NOx Sensor Performance - Signal Stuck Low
Bank 1 Sensor 1
P225F-00
NOx Sensor Performance - Signal Stuck Low
Bank 1 Sensor 2
U029D-00
Lost Communication With NOx Sensor "A"
UI
U029E-00
; Live
Lost Communication with NOx Sensor B
4/6
6/1/22, 2:38 PM
P229F-64
Article
NOx Sensor Gas Outlet Removed, Signal
Nuisance
plausibility failure
code, most
likely
“Confirmed =
False”
Although the codes above have the term "NOx sensor" in their descriptions,
it is highly unlikely that the sensor is the cause of any of these codes. The
table above specifies the likely cause of each code.
Rules for Replacement
Warranty will only cover replacement of the NOx Sensors if one of the codes
in Red or Yellow listed above is active or confirmed. If the NOx Sensor is
suspected to have failed with no active or confirmed codes, an eService
case is required for further evaluation.
Review the video link below.
NOx Sensor
Standard Diagnostic Time for a NOx Sensor is 1.0 hr.
;
Tags
p2200-13
p2203-00
p2205-13
p2206-00
p2208-00
p026c-00
p026d-00
p2201-64
p225c-00
p220f-93
p229e-13
p220a-1c
p220b-1c
p225d-00
p225f-00
u029d-00
u029e-00
p229f-64
p22fb-92
p220e-93
p22a6-00
p22a1-00
p22a3-13
p22a4-00
p225e-00
p20ee-00
p103c-00
Live UI
p22fe-00
5/6
6/1/22, 2:38 PM
p207f-00
Article
Related links and attachments
No links or attachments available
unlocking uptime
Feedback
Give feedback
to help improve the content of this article
6/6
- 💯【Conta.ct us for Support Directly】If you met any...
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW...
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS...
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full...
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE...
- 【TURN OFF CEL】 This AL319 car scanner diagnostic tool...
- 【EXTENSIVE APPLICATION】 Autel AL319 Compatible with...
- 【FOR END USER & DIYERS】 This error code reader AL319 is...
- 【USER-FRIENDLY DESIGN】 This OBD2 scanner and check...
- 【HIGH-QUALITY SERVICES】 12 months war.ranty from the...
Last update on 2026-06-12 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: KC-2116
Replacement Service Bulletin Number:
MFR Communication Date: 2022-05-26
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used escaner automotriz device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way, and we’ll provide a solution within 24 hours. THINKSCAN 689BT Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- [Good News] THINKSCAN 689BT is the most competitive automotive scan tool to date, offering wireless updates with no subscription fees(valued 500Buc.ks) . With all the features of THINKTOOL PD8,PRO, built on Android 10 platform with 4-core CPU, 4GB RAM
and 64GB ROM, serving up to 5X faster than older MAX/MINI/PLUS vehicle scanners escaner automotriz, no more slow and delayed feedbacks, it's time to update your garage tool. - [Big Money Saver] Premium THINKSCAN 689BT Wireless Diagnostic Scanner Escaner Automotriz, save up to 400USD per year, includes all useful features: Full bi-directional controls, ECU coding, 34+ services, OEM all system diagnostics, Worldwide vehicles coverage, CAN FD & DoIP, FCA AutoAuth（The 689BT only provides a login and purchase portal, and users are required to register for an FCA account and pay a membership fee in order to perform the relevant automotive diagnostics)
- [3000+ Active Tests]Active testing is one of the most useful features in automotive maintenance and greatly improves mechanic efficiency. THINKCAR 689BT bidirectional scanner can send action commends to vehicle sub-systems or components for active test without using vehicle controls. It can perform various tests such as: EVAP Test, Fuel Trim Reset, Injector Buzz Test, Window/ Mirror/ Door Lock Test, Pump and Value Tests, etc. Get functions from "Diagnose>Car Model>System>Active Test".
- [Hot Advanced Features] 689BT bidirectional tool scanner for car newly adds ECU Coding, Power Balance, Flash Hidden Functions, Reset Adaptive Data, Match Replaced Components, Customize OE-Settings. Such as: 1. changing the color of interior lights 2. switching on/off the auto hold, 3. customizing dash kits 4. activating the auto side mirror folding function 5. disables auto start-stop. Note: Coding functions vary by model&year.
- 【Warm Tips】Wired THINKSCAN 689 is connected through a detachable OBDII cable, and we also have added OBD2 Extension Cable (about 60 cm/2 feet) as g ift, enabling customers handling vehicle repairs with ease. Just click "Bundles Item" above to get it. Note: FCA AutoAuth is a third-party service, additional cost may be required.
- 【Professional Car Diagnostic Tool】Tired of renew fees? Thinkscan 689 scanner provides dealer-level advanced functions without annual fees for auto mechanics and repair shops. 34+ Services, 3000+ Active Test, ECU Coding, 140+ Brands Coverage, FCA AutoAuth, CANFD&DOIP Protocol, Component Matching, Power Balance, V.A.G Guided, Compatible with Google Chrome integration, etc. With strong hardware backing, 64G Memory, Android 10, 4-core processors, and 4150mAh battery. Thinkscan 689 brings you the best as your daily business helper and never lets you drop the ball!
- 【Over 34 Reset Service, Adaptation + Relearn + Calibration + Initialization + Matching】Made for workshops, Thinkscan 689 scanner provides 34+ services for worldwide vehicles: such as Gear/SAS/EPB/TPMS/D.P.F/I.M.M.O/BMS/ETS/Oil/Brake/AFS/GEARBOX/SUNROOF/SUS Reset, ABS Bleed, Injector coding, etc. Warm tips: Compatibility may vary on vehicles' model and year, please contact seller before purchase to make sure it works well on your cars.
- 【Real Active Test】Thinkscan 689 scan tool features over 3000+ full bi-directional control ability, to send commands to vehicle’s systems/components, to verify system input/output without using the vehicle's controls, e.g. turn on the radiator fan, modulate the throttle, open/close windows, operate mirrors, Injector Buz Test, turn on interior&exterior lights, sound horn, test door lock actuators, turn on/off front/rear side ACM Solenoid, Vehicle level position calibration, Wheel Speed Sensor Supply.
- 【Comprehensive Solutions with Advanced Features】Take your vehicle customization to the next level with the Thinkscan 689's advanced ECU coding capabilities. This scan tool provides power balance, PMI, unlock more new features and enhance performance by activating dormant functions, customizing OE settings, matching replaced components, and reprogramming adaptive data to elevate your driving experience. Note: Compatibility varies by car models, please check before order.
- 【Cost-effective OBD2 scanner】 Thinkcar Thinkdiag2 is the most powerful wireless diagnostic tool for it's price! Equipped with multi-functions of Newly added CAN-FD protocol, BiDirectional control(Active Test), 15 Maintenance resets, All Systems diagnosis, Auto VIN, FCA AutoAuth, Unlock the protected FCA vehicle SGW module on Chrysler, Dodge, Jeep, Alfa Romeo, and Fiat vehicles manufactured after 2019.120+ Car brands coverage, No IP limited, etc. Good for workshops & DIYers. Kindly send us VIN to check compatibility before purchase
- 【OE-Level Full Systems Car Scanner with Added CAN FD Protocol】 Upgrade of Thinkdiag, Thinkdiag2 is a bluetooth diagnostic tool can diagnose Full System such as ECM, ABS, SRS, TCM, EPB, TPMS, SAS, A/C, BMS, etc. Thinkdiag2 can read/clear fault codes, read real-time data, read control module information,etc. As the only diagnostic scanner in this price range that supports the CAN-FD protocol, it suits for the latest GM(2019-) , saving $100 to buy a CAN FD adapter, reducing the risk of undetected errors to enhancing the user experience
- 【Bidirectional Test】This bidirectional scan tool Thinkdiag2 allows you to send commands from your smartphone directly to the vehicle's ECU for active testing, quickly locate problem areas, such as A/C clutch, windows, doors, sunroof, etc., reducing the diagnostic time and money. (Note: kindly send us VIN to check compatibility before order.)
- 【15+ Maintenance Functions】Thinkdiag2 OBDII code scanner is designed for individual car owners, DIYers, and small repair shops, which has a separate menu of 15 common special functions, such as Oil reset, EPB reset, SAS calibration, ABS bleeding, injector code, TPMS reset, etc. Enter from the all-system diagnostic menu to unlock more system special functions, and effectively handle the reset and relearn of most cars. Note: The Maintenance functions that each car can do may be different
- 【120+ car brands & FCA Autoauth+10 languages】Thinkcar thinkdiag2 helps you to troubleshoot the problems fast for 100 + US, European, Asian vehicle brands after 1996 that use the OBDII protocol. Only support 12V cars, including gasoline cars and diesel cars. Supporting Autoauth allows you to unlock the protected FCA vehicle SGW module on Chrysler, Dodge, Jeep, Alfa Romeo, Fiat vehicles, etc. (Note: Only provide AutoAuth login portal, and need purchase the registration number on the AutoAuth website by yourself.) Multilingual function allows workshop mechanics to avoid language barriers and use it around the world Without restriction
Last update on 2026-06-12 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.