NOx system error messages

BMW E series

Error messages relating NOx sensor:

2AEC Nitrogen Oxide Sensor Self Diagnostics

2AF0; 2B05 nitric oxide sensor, heating

2AF2; 2B06; 2B09 nitric oxide sensor, Lambda linear

2AF4; 2B07; 2B0A NOx sensor, electrical

2AF6; 2AFB; 2B0B nitric oxide sensor, Lambda binary

2AF9 nox sensor, nox signal: coast mode check

2EAE NOx sensor message missing (timeout)

30D6 nitric oxide sensor, plausibility

30D8 NOx sensor, Sensor damaged

30DA NOx sensor, heating time

30DC nitric oxide sensor, heating

30DE NOx sensor – Lambdaprobe before catalyst, Korrelation

30E0 NOx sensor, Offset

30E2 nitric oxide sensor, thrust test

30E4 nitric oxide sensor, aging

30E6 nitric oxide sensor, dynamics

 

Error messages relating NOx catalytic converter:

30E9 nitric oxide catalytic converter, aging

30EA nitric oxide catalytic converter, sulphurized*

*if error appears repeatedly and/or forced desulfurization is not possible/successful

 

Hidden problems with NOx sensor. Following diagnostics live data:

NOx concentration is 0 ppm**

(INPA data | NOx Sensor / Exhaust temperature menu) after:

  • engine is warmed up
  • exhaust temperature is more than 220 oC
  • driving speed exceeds 20 km/h for more than 2 min

**continuously or periodically: sensor is damaged

 

Problems with NOx system (NOx sensor and/or NOx catalytic converter) can be the reason of following error messages:

29CC misfirings, several cylinders

29CD misfirings, cylinder 1

29CE misfirings, cylinder 2

29CF misfirings, cylinder 3

29D0 misfirings, cylinder 4

29D1 misfirings, cylinder 5

29D2 misfirings, cylinder 6

29E0 fuel mixture control

29E1 fuel mixture control 2

29F4 catalytic converter conversion

29F5 catalytic converter conversion 2

2A2B fuel mixture control

2A2C fuel mixture control 2

2C31 Lambda probe in front of catalytic converter, trimming control

2C32 Lambda probe in front of catalytic converter 2, trimming control

2C7E Lambda probe behind catalytic converter, trimming control

2C7F Lambda probe behind catalytic converter 2, trimming control

etc.

 

BMW F series

Error messages relating NOx sensor:

12C104 NOx sensor, binary oxygen sensor: Line disconnection

12C108 NOx sensor, binary oxygen sensor: Short circuit

12C204 NOx sensor, linear oxygen sensor: Line disconnection

12C208 NOx sensor, linear oxygen sensor: Short circuit

12C304 NOx sensor, heating: Activation, line disconnection

12C308 NOx sensor, heating, activation: short circuit

12C401 NOx sensor, Plausibility, signal activity too low

12C501 NOx sensor, sensor poisoning: binary lambda signal too lean

12C502 NOx sensor, sensor poisoning: binary lambda signal too rich

12C504 NOx sensor, sensor poisoning: NOx signal too low

12C601 NOx sensor, operating readiness: Signal not available at start

12C602 NOx sensor, operational readiness: signal not available during operation

12C701 NOx sensor, heating: Heat output too low during starting

12C702 NOx sensor, heating: Heat output too low during operation

12C704 NOx sensor, heating: Supply voltage

12C801 NOx sensor, oxygen sensor before catalytic converter, plausibility: correlation fault

12C901 NOx sensor, adjustment: fault at start of charging phase

12CA01 NOx sensor, trailing-throttle check: binary lambda signal too rich

12CA02 NOx sensor, trailing-throttle check: linear lambda signal too rich

12CA04 NOx sensor, overrun test: NOx signal too low

12CA08 NOx sensor, overrun test: NOx signal too high

12CB01 NOx sensor, regeneration, nitrogen-oxide cat.: regeneration monitoring

12CB02 NOx sensor, regeneration, nitrogen-oxide cat.: time-controlled regeneration abort

12CC01 NOx sensor, oxygen sensor signal after regeneration, dynamics: Binary dynamic response too low

12CD01 NOx sensor, self-diagnosis: limit value 1 exceeded

12CD02 NOx sensor, self-diagnosis: limit value 2 exceeded

12CE01 NOx sensor, version: incorrect

CD8510 Lost Communication With NOx Sensor ‘A’

 

Error messages relating NOx catalytic converter:

180401 NOx catalytic converter: Efficiency below limit

 

Hidden problems with NOx sensor. Following diagnostics live data:

NOx concentration is 0 ppm**

(ISTA D/+ data) after:

  • engine is warmed up
  • exhaust temperature is more than 220 oC
  • driving speed exceeds 20 km/h for more than 2 min

**continuously or periodically: sensor is damaged

 

Related entries:

Performance check of NOx sensor

Stratified charge. NOx system performance evaluation