If an on-board computer scan of your Mercedes Benz has highlighted the error codes P229F62,  P229e or P2202, this means that the NOx sensor Mercedes on your vehicle has failed. These error codes are applicable to the following Mercedes Benz models: Sprinter W906, W222, W205, W212, S212, A207, C207, W213, W238, GLC, W166 GLE Bluetec and many other cars.

Below in this guide you'll find our collected the most common Diagnostic Trouble Codes  - DTC for engine management ligh (EML) of NOx sensors and NS11A NGK Japan probe head.

What happens when a NOx sensor fails?

NOx is short for nitrogen oxide. A NOx sensor is a device designed by Lambdasonde to detect the amount of nitrogen oxide excreted by your Mercedes Benz’s exhaust system. This sensor or probe is vital when it comes to detecting the saturation point of nitrogen oxide to ensure the efficient running of the engine and effective exhaust gas measurement/after-treatment.

When a NOx sensor ballast - control unit fails, you may notice several vehicular OBDII OBD II DTC diagnostic trouble codes also known as faults on the dashboard of your Mercedes Benz, including the “check engine” light. Fuel mileage may appear greater than before, and the engine could even start blowing thick, black smoke.

Exhaust after treatment malfunction is very common issue for cars with AdBlue SCR system.

What does NOx sensor do?

NOx sensors have been introduced to meet European Union environmental regulations, so that cars could have certifications for EURO 5 and EURO 6.

NOx emission control units have built-in two functions, it is combined with Oxygen also known as lambda sensor and NOX sensor.

NOx sensors are fitted on the exhaust system usually before catalyc converter and or after, it depends on the car model.

When you are driving sensors are measuring out the oxygen level in the exhaust as well as nitrogen oxides NOx cotent to ensure engine is working efficiently and you are complying with environmental laws as well.

What is Adblue and DEF ?

Adblue is also called as Diesel Exhaust Fluid (DEF) and the reductant source is usually automotive grade urea, whatever name you call both are the same thing and meaning and used for the same purpose to make our enviroment much more cleaner and comply with strict environmental regulation laws worlwide, in addition it helps catalytic converter to last longer.

Where to get NOx sensor repair kit ?

Based on your mercedes benz error code we can offer repair kit, it all depends which error code is being stored it could be found using OBDII scanner or any other diagnostic tool, there is no need to use dealer Xentry software.

Once you have found fault code email our friendly customer services with car model, year, error code and old part number or picture asking for nitrogen oxide sensor repair kit, when we'll receive this information from we'll offer the cheapest option to fix adblue system's malfunction.

What does the Mercedes Benz P2202 P229e P229F error codes mean?

This is a generic code to signify the electronic control module of your vehicle has detected that the sensor signal of your NOx sensor is low on bank one. It is caused by the ECM receiving lower than expected voltage from the signal wire. This can mean that either the NOx sensor has internally shorted, or the wiring has shorted, thereby causing low voltage. This can occur if the sensor has become clogged with soot or otherwise contaminated.

P2202 code and the following ones are related to NOx sensor issue P2200, P2201, P220162, P2203,  P2204, P220400 and P220000 when it monitors a fault within the NOx sensors or their circuits.

As you have already noticed there are many different fault codes generated when sensor fails, but all of them means the same just car generates different kind of numbers based of measurements which cant be completed.

There is 2 NOX sensors fitted on the exhaust system bank 1 and bank 2, they are also called as upstream and downstream sensors on the Xentry software system.

The definition of P2202 error code is NOx Sensor Circuit  range performance issue Low Input Bank 1.

The definition of P220162 fault is the nox sensor 1 (cylinder row 1) has malfunction. The signal comparison is faulty.

P229F P229F62 P229F63 P229F92 P229FE1 P229E11 and P229e error code stands for NOx sensor circuit range performance issue at bank 2.

How to fix a Mercedes Benz P229F62 P229E11 P229F09 or P2202 error code

The most common fixes for NOx sensor errors are as follows:

• Give the reductant tank a thorough clean, and refill it with fresh adblue fluid to enable regeneration cleaning of the exhaust system.
• Replace the Lambdasonde NOx sensor if cleaning does not solve the issue.
• Replace the entire NOx module if additional pinpoint testing cannot identify the problem.

Mercedes nox sensor doesn't require programming, you can DIY at home.

Sometimes mercedes-benz give courtesy and gives warranty replacement for sensors, even if it is out of date.

When AdBlue system has malfunction sometimes you will see the following warning message on the dashboard:

  • AdBlue: system fault. No restart in x km mi! See Owner's manual
  • Eng. Start not possible in x km mi

Explanation of error codes related to faulty NOx emission control unit sensor:

  • U029E00 - Lost communication with NOX sensor B
  • U029E
  • U029D00 - Lost communication with NOX sensor A
  • U029D

These above 4 fault codes are mostly being displayed when SCR emmision control unit also know as ballast fails together with sensor probe.

Mercedes-Benz nox error codes and explanations

  • P300648 NOx sensor 2 (cylinder bank 1) has an electrical fault
  • P300647 NOx sensor 2 (cylinder bank 1) has an electrical fault
  • P300A63 Component NOx sensor downstream of SCR catalytic converter has a malfunction
  • P300646 Component NOx sensor downstream of SCR catalytic converter has a malfunction. The commanded position cannot be reached
  • 178700 The upper limit value of component NOx sensor upstream of SCR catalytic converter has been exceeded
  • 111B00 The upper limit value of component NOx sensor downstream of SCR catalytic converter has been exceeded
  • P300640 The NOx sensor 1 (cylinder bank 1) has an electrical fault
  • P30063F The Nox Sensor 1 Cylinder bank 1 has an electrical Fault
  • P30067E The NOx sensor 1 (cylinder bank 1) has a malfunction
  • P30064C The efficiency of the SCR catalytic converter (cylinder bank 1) is not sufficient
  • P13F600 Adblue system warning The engine cannot be started because the outlet after-treatment system has tampered
  • P13E300 Adblue system Warning stage 2 The number of possible starts is limited due to malfunction in the AdBlue system
  • P229FFF Nitrogen Oxide (NOx) sensor 2 (cylinder bank 1) is faulty
  • P220F93 P22A100 P22FE00
  • 14B500 111B00 Component NOx sensor upstream of the SCR catalytic converter has a plausibfility error
  • 14B500 A plausibility error exists in the component Nitrogen Oxide (NOx) sensor upstream of the selective catalytic
    reduction (SCR) catalytic converter
  • 153500 Component Nitrogen Oxide (NOx) sensor upstream of the selective catalytic reduction (SCR) catalytic converter responds
    too slowly
  • 133000 The upper limit value of component Nitrogen Oxide (NOx) sensor upstream of the selective catalytic reduction
    (SCR) catalytic converter has been attained
  • 149C00 153600 Nox Sensor upstream of SCR catalytic converter is not operational and has an internal fault
  • 111A00 14B500 Component NOx sensor upstream of SCR catalytic converter has a plausibility error
  • 153500 Component NOx sensor upstream of SCR catalytic converter reacts too slowly
  • 16F400 This function is not yet supported by the control unit
  • P229f09 - Nox sensor 2 cylinder bank 1 has a malfunction there is a component fault
  • P229F92 NOx sensor 2 (cylinder bank 1) has a malfunction. The function or the instruction is faulty
  • P229f28 - Nox sensor2 cylinder bank 1 has malfunction
  • P229F-91 P229F91 NOx sensor 2 (cylinder bank 1 ) Has a malfunction, the parameter is outside the permissible range
  • P229F62 Signal of NOx sensor implausible
  • P229F62 - The signal of component NOx sensor is implausible. The following test procedure must always be performed in its entirety
  • P225B-85 P225B85 The Calibration Value for NOx sensor 2 (cylinder bank 1) was not recognized. There is a signal fault or the message is faulty
  • P220F-77 P220F77 NOx sensor heater Control Circuit Range / Performance Bank 1 Sensor. The commanded position cannot be reached
  • P229F-62 P229F62 NOx sensor 2 (cylinder bank 1) has a malfunction. The signal comparison is faulty
  • P1C6B00 The exhaust aftertreatment system has a malfunction due to a detected manipulation
  • P221401 The nox sensor on cylinder bank 2 has malfunctioned (general electrical fault)
  • P229FFB NOx sensor 2 has malfunction
  • P229F85 P229F-85 NOx Sensor 2 (Cylinder Bank 1) Has A Malfunction. There Is A Signal Above The Permissible Limit Value
  • P220F NOx Sensor Heater Control - Circuit Range/Performance (Bank 1 Sensor 2)
  • P229E NOx Sensor - Circuit Malfunction (Bank 1 Sensor 2)
  • P229F - Nitrogen Oxides (NOx) sensor 2, bank 1 - circuit range/performance
  • P13D-F09 The AdBlue system has a malfunction. There is a component fault.
  • P229F-62 NOx sensor 2 (cylinder bank 1) has a malfunction. The Signal Comparison is faulty
  • P229F-09 NOx sensor 2 (cylinder bank 1) has a malfunction. There is component fault.
  • P229FFD - NOx sensor 2 has malfunction
  • P220400 the nox sensor 1 (cylinder bank 1) has a sporadic malfunction._
  • P220000 the nox sensor 1 (cylinder bank1) has an electrical fault.
  • P220000 NOx sensor 1 Bank 1 Elektrischer Fehler
  • P220164 The NOx sensor 1 (cylinder bank 1) has a malfunction. There is an unreasonable signal
  • P220164 The NOx sensor 1 (cylinder bank 1) has a malfunction. There is an implausible signal
  • P220162 - The NOx sensor (cylinder bank 1) has a malfunction. The signal comparison is faulty
  • P20EE84 The efficiency of the SCR catalytic converter (cylinder bank 1) is not sufficient. There is a signal below the permisible limit value
  • P204F96 - The AdBlue system (cylinder bank 1) has a malfunction. There is an internal component fault.
  • P140300 - The control unit AdBlue has a malfunction.
  • P220E77 - The heater of NOx sensor 1 (cylinder bank 1) has a malfunction. The commanded position cannot be reached.
  • P220E77 - The commanded position cannot be reached.
  • P220E00 - The heater of NOx sensor 1 (Cylinder bank 1) has a malfunction
  • P220F77 - NOx sensor heating (Bank 1 sensor 2) Specified position not reached
  • P220F77 - The heater of NOx sensor 2 (cylinder bank 1) has an electrical fault. The commanded
    position cannot be reached
  • 18B800 18B900 The signal of component NOx sensor is implausible. The following test procedure must always be performed in its entirety
  • 18B800 The difference between the measured signal and the calculated signal of the NOx sensor downstream of the SCR catalytic converter is too great
  • 18B900 The difference between the measured signal and the calculated signal of the NOx sensor upstream of the SCR catalytic converter is too great
  • P22AA00 - NOx sensor heating (Bank 1 sensor 2) error sporadic
  • P22AA00 The heater of NOx sensor 2 (cylinder bank 1) has a sporadic malfunction
  • P22AA Nitrogen Oxides NOx sensor 2 bank 1 heater sense circuit - circuit intermittent
  • P220221 - The NOx sensor (cylinder bank 1) has a short circuit to ground. The signal amplitude is less than the minimum amplitude.
  • P22011 - The NOx sensor (cylinder bank 1) has an electrical fault. There is a short circuit to ground.
  • P220011 P2200-11 - The NOx sensor (cylinder bank 1) has an electrical fault. There is a short circuit to ground.
  • P229FE1 P229F(E1) Nitrogen oxides (NOx) sensor 2, bank 1 - circuit range/performance
  • P220A0(16) Nitrogen oxides (NOx) sensor 2, bank 1 - circuit low
  • P229E(11) Nitrogen oxides (NOx) sensor 2, bank 1 - circuit malfunction
  • P22A677 - The heater of NOx sensor 2 (cylinder bank 1) has an electrical fault. The commanded position cannot be reached.
  • P2BA901 - The emission limit for the NOx concentration has been exceeded (Adblue quality is too low). There is a general electrical fault.
  • P13DF09 - The Adblue system has a malfunction. There is a component fault.
  • P13E400 - The remaining driving distance is limited due to a malfunction in the AdBlue system.
  • P22A0 - Nitrogen Oxides NOx sensor 2 Circuit Low Voltage Bank 2
  • P22A002 Nox Sensor 2 (Cylinder Bank 1) Has a Short Circuit To Ground. There is a general signal fault
  • P22A021 - NOx sensor 2 (cylinder bank 1) has a short circuit to ground. The signal amplitude is less than the minimum amplitude
  • P2200 - NOx Sensor Circuit bank 1
  • P2201
  • P2201-01 P220101 General electrical failure
  • P2201-62 NOx sensor (cylinder bank 1) has a malfunction. The signal comparison is faulty.
  • P2202 - NOx Sensor Circuit Low Bank 1
  • P2203-00 - NOx Sensor 1 Bank 1 Signal too High
  • P2204
  • P2214-01 P221401 The NOx Sensor (Cylinder Bank 2) Has a Malfunction. There is a general Electrical
    failure
  • P2205-13 P220513 The heater of the NOx sensor (Cylinder bank 1) has an electrical fault or an open circuit
  • P2214 - NOx Sensor Circuit Range/Performance Bank 2
  • P2202, P229F - Fehlercode
  • P2201E5 Component NOx sensor upstream of SCR catalytic converter has a malfunction. The signal comparison is faulty
  • P220013 - The NOx sensor 1 (cylinder bank1) has an electrical fault. There is an open circuit.
  • P220108 The NOx sensor (cylinder bank 1) has a malfunction. There is a signal fault or the message is faulty.
  • P221408 The NOx sensor (cylinder bank 2) has a malfunction. There is a signal fault or the message is faulty.
  • P221401 Nox sensor cylinder bank 2 malfunction.
  • P220B00
  • P22A1-22 P22A122 NOx sensor 2(cylinder bank1) has a short circuit to positive. The signal amplitude is greater than the maximum amplitude.
  • P229F-23 P229F23 NOx sensor 2(cylinder bank1) has a malfunction. No signal change: voltage level is too low.
  • P13DF00 The AdBlue system has a malfunction
  • P1C7D-00 P1C7D00 The remaining driving distance without speed limitation is limited due to a malfunction in the exhaust
    aftertreament system. There is general failure
  • P13F6-00 P13F600 The engine cannot be started because the exhaust aftertreatment system has been tampered with.
    There is a general failure
  • P204F-96 P204F96 The AdBlue system (cylinder bank 1) has a malfunction. There is an internal component fault
  • P13DF-00 P13DF00 The AdBlue system has a malfunction. There is a general failure
  • P2BA9FD The emision limit for the NOx concentration has been exceed (AdBlue quality is too low)
  • P229E13 P229E-13 NOx sensor 2 (cylinder bank 1) has an electrical fault. There is an open circuit
  • P229E-11 P229E11 - NOx sensor 2 (cylinder bank 1) has an electrical fault. There is a short circuit to ground
  • P22A1 NOx Sensor Circuit High Bank 1 Sensor 2
  • P22A2 NOx Sensor Circuit Intermittent Bank 1 Sensor 2
  • P22A3 NOx Sensor Heater Control Circuit/Open Bank 1 Sensor 2
  • P22A4 NOx Sensor Heater Control Circuit Low Bank 1 Sensor 2
  • P22A5 NOx Sensor Heater Control Circuit High Bank 1 Sensor 2
  • P22A6 NOx Sensor Heater Sense Circuit Bank 1 Sensor 2
  • P22A7 NOx Sensor Heater Sense Circuit Range/Performance Bank 1 Sensor 2
  • P22A9 NOx Sensor Heater Sense Circuit High Bank 1 Sensor 2
  • P300637 - NOx sensor 1 bank 1 Faulty operation
  • P300637 The NOx sensor 1 (cylinder bank 1) has a malfunction
  • P3009EC Component NOx sensor Upstream of SCR Catalytic Converter has a malfunction
  • P3009EC NOx sensor Circuit Range/Performance Bank 1 Sensor 1
  • P300637 The Component NOx sensor Upstream of SCR Catalytic Converter has a sporadic malfunction
  • P300647 NOx sensor 2 (cylinder bank 1) has an electrical fault
  • P300647 An electrical fault exists in NOx sensor 2 (cylinder bank 1)
  • P300648 An electrical fault exists in NOx sensor 2 (cylinder bank 1)
  • P300648 NOx sensor 2 (cylinder bank 1) has an electrical fault
  • P300646 NOx sensor 2 (cylinder bank 1) is faulty
  • P300646 Component NOx sensor Downstream of SCR Catalytic Converter has a malfunction. The commanded position cannot be reached
  • P300647 Component NOx sensor Downstream of SCR Catalytic Converter has an open circuit
  • P300648 Component NOx sensor Downstream of SCR Catalytic Converter has a short circuit to ground
  • P1BC300 Datos perifericos adicionales de la averia para el analisis de averias
  • P22A021 El sensor de NOx 2 (banco de cilindors 1) tiene cortocircuito contra masa. La amplitud de senal es mas pequena que la amplitud minima
  • P220162 La senal del componente Sensor NOx no es plausible. El siguiente proceso de comprobacion se ha de realizar sin falta por completo
  • P220E77 La calefaccion del sensor de NOx 1 (banco de cilindros 1) tiene una irregularidad de funcionamiento. La posicion ordenada no es alcanzable
  • P229E13 NOx sensor 2 (cylinderraekke 1) har en elektrisk fejl. Der foreligger en afbrydelse
  • P229EFB NOx sensor 2 (cylinderraekke 1) har en elektrisk fejl
  • P229E11 NOx sensor 2 (cylinderraekke 1) har en elektrisk fejl. Der foreligger en kortslutning til stel
  • P1BC300 Lisaa vian olosuhdetietoja vian analysoimiseksi (tietue 03)
  • P229F91 NOx-tunnistimessa 2 (sylinteririvi 1) on toimintahairio. Parametri ei ole sallituissa rajoissa
  • P220162 Rakenneosan NOx-tunnistin signaali ei ole uskottava. Seuraava tarkastus on ehdottomasti tehtava
    kokonaan

A list of MB cars which use NOx sensor:

  • Sprinter W906 W910 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
  • Sprinter: 210, 310, 510, 213, 413, 513, 216, 316, 416, 516, 219, 319, 519 BlueTEC
  • Vito W447 2014, 2015, 2016, 2017, 2018
  • Vito: V200, V220, V250, 109 CDI, 111 CDI, 114 CDI, 116 CDI, 119 BlueTec
  • CLA W117 C117
  • S class W220 Facelift
  • S Class: W221 Facelift, W222, C217, A217
  • S Class: S320, S350, S400, S450, S500, S600, S63 AMG, S65 AMG, S300
  • SLK Class R172
  • R class R251 W251 MPV
  • C class W204 Saloon Sedan S204 Estate C204 Coupe
  • C Class Pre-Facelift W205, S205, A205, C205 2014, 2015, 2016, 2017
  • C Class W205 S205 A205 C205 Facelift 2018, 2019, 2020
  • C Class: C180, C200, C250, C300, C350, C400 C45 AMG, C63 AMG, C220, C220d
  • C class W206
  • E Class: W212, S212, A207, C207 Pre-Facelift and Facelift
  • E Class: E200, E250, E300, E350, E400, E500, E63 AMG, E220, CDI, CGI
  • GL Class: GL280 GL300 GL320 GL350
  • GLK200 GLK220 GLK250 GLK350 Facelift Bluetec CDI BlueEfficiency 4Matic
  • GLE GLE250 GLE300d GLE350
  • GLS350
  • ML W164 Facelift SUV W166
  • ML: ML250 ML280 ML300 ML320 ML350 Bluetec, ML400, ML550, ML63 AMG
  • A Class W177 2018, 2019
  • E Class W213 S213 2016, 2017, 2018, 2019
  • E Class E200 E250 E300 E350e E400 E450 E200d E220d E300d E350d E400d 4MATIC
  • E Class C238 2017, 2018, 2019
  • E class A238 Convertible Cabriolet
  • CLS W257 C257 2018  2019 2020 2021 CLS400
  • G Glass W463
  • GLC X253 Hatchback
  • GLC C253 Coupe
  • GLC300 GLC250 GLC200 GLC350d GLC250d GLC220d 4Matic
  • X class W470 Pickup Pick-Up 2017 - 2020
  • X220d X250d X350d

Below you will find some part numbers of Mercedes-Benz and Continental, which nox-sensors we keep in stock.

  • A0009052012 SNS1009 5WK97424 A3C01540200-01
  • A0009057411 A0009054412 A0009056007
  • A0009054612 A0009056307 A0009053712
  • A0009056107 A0009054614
  • A0009059812 SNS1049 A3C03950900-01
  • A0009051512 A3C03398600-621
  • A0009059304 A2C39280300-276
  • A0009055106 A3C00312100-298
  • A0009053703 5WK96703A
  • A0009051412 A3C03398500-620
  • A0009053506 5WK96681F
  • A0009056304 5WK97250
  • A0009052410
  • A0009053403 5WK96681D
  • A0009059603 A2C12547900-081G 5WK96681E
  • A0009053503 5WK96682D
  • A0009052909 A2C16442800-292
  • A0009053000 5WK96682
  • A0009052900 5WK96683
  • A0009057000 5WK96682A
  • A0009057100 5WK96683A
  • A0009053503 5WK96682C
  • A0009053603 5WK96683C
  • A0009055100 5WK96681
  • A0009056900 5WK96681A
  • A0009053403 5WK96681C
  • 5WK9 6681B 5WK96681B
  • A0101539528 5WK96653C
  • A0009050008 A2C12610200-284
  • A0009052709 A2C16442400-290
  • A0009053109 A2C15463300-02 SNS424B
  • A0009053009 A2C15462900-02 SNS381B
  • A0009053606 5WK96682F
  • A0009059703 5WK96682E
  • A0009050108 A2C13684300-286
  • A0065427218 5WK96677
  • A0035428818 5WK96606
  • A0009053706 5WK96683F
  • A0009050208 A2C13684500-287
  • A0009053603 5WK96683D
  • A0009052809 A2C16442600-291
  • A0009059112 A0009059112 SNS1048 A3C03950800-01
  • A0009057208 SNS424A A2C12777100-01
  • A0009054604 5WK97424 SNS424 A2C98
  • A0009057108 SNS381A A2C12776200-01
  • A0009057803 SNS382 5WK97382 A2C95270100-01
  • A0009054704 SNS381 5WK97381 A2C95270000-02
  • A0009052310 A2C19194600-295
  • A0009054410 A3C01131200-612
  • A0009056204 5WK97249
  • A0009055006 A3C00311900-297
  • A0009058411 A3C01067400-608
  • A0009058111 SNS1006 A3C01057700-01
  • A0009058011 SNS1005 A3C01057500-01
  • A0009059112 SNS1048 A3C03950800-01
  • A0009050914 SNS1116 AAA2082120000
  • A0009055113 A0009058509
  • A0009059803 5WK96683E A2C12548400-083G
  • A0009058611 A3C01067900-610
  • A0009050508 0281007097/098
  • A0009050060 A0009053304 A0009053504
  • A0009058402 A0009053404 A0009059401
  • A0009050608 A0009059601
  • A0009055109 0281007403/404
  • A0009053309 SNS707B A2C15463500-02
  • A0009058311 SNS1008 A3C01058100-02
  • A0009054510 A3C01131300-613
  • A0009054310 A3C01130900-611
  • A0009052210 A0009052012
  • A0009056104 5WK97248
  • A0009057408 SNS707A A2C12777200-01
  • A0009051612 A3C03398700-622
  • A0009055206 A3C00312300-600
  • A0009055010 A3C01718000-616
  • A0009054614 Denso NS0005
  • A4709056001 A4709056101 A4709053202
  • A4709055400 A4709053302 A4709055002

Replacing your Mercedes Benz NOx sensor

If you need to replace your Mercedes Benz NOx sensor, Xenons4U can help. Our team of experts are on-hand to identify the part you need, and you’ll even enjoy peace of mind with a 12-month warranty.