P229F on Genesis
NOx Sensor Circuit Range/Performance (Bank 1 Sensor 2)
P229F on Genesis vehicles indicates nox sensor circuit range/performance (bank 1 sensor 2). Au7o has documented this code across 1 Genesis model — most commonly on GV80. P229F indicates the engine control module detected a range/performance problem with the downstream NOx sensor on bank 1 (sensor 2), most common on diesel vehicles with SCR/AdBlue emissions systems. The NOx sensor measures nitrogen-oxide levels in the exhaust so the system can dose diesel exhaust fluid correctly and verify the catalyst is working. An implausible or out-of-range signal can trigger emissions warnings, reduced power, and on many diesels eventual no-start countdowns tied to emissions compliance. It is an emissions-system fault that should be addressed before it escalates. Typical repair costs on Genesis range from $400 to $2,000, depending on the specific model and root cause.
Common Causes of P229F
- •Faulty downstream NOx sensor (bank 1 sensor 2)
- •Wiring or connector corrosion at the NOx sensor
- •Exhaust leak upstream of the sensor
- •Contaminated or incorrect diesel exhaust fluid (DEF/AdBlue)
- •SCR catalyst degradation
- •NOx sensor control-module communication fault
- •ECM software needing update/recalibration
P229F on Genesis by Model
Genesis GV80(1 issue)
- Diesel NOx System Issues (International Markets)2021-2023
Diesel GV80 models experience NOx aftertreatment system issues, including SCR catalyst efficiency codes and DEF quality warnings. The NOx sensor can give false readings, triggering regeneration cycles and reduced power modes.
Looking for P229F on a different make?
View P229F across all makes →Frequently Asked Questions
What does P229F mean on Genesis?▼
P229F stands for "NOx Sensor Circuit Range/Performance (Bank 1 Sensor 2)." P229F indicates the engine control module detected a range/performance problem with the downstream NOx sensor on bank 1 (sensor 2), most common on diesel vehicles with SCR/AdBlue emissions systems. The NOx sensor measures nitrogen-oxide levels in the exhaust so the system can dose diesel exhaust fluid correctly and verify the catalyst is working. An implausible or out-of-range signal can trigger emissions warnings, reduced power, and on many diesels eventual no-start countdowns tied to emissions compliance. It is an emissions-system fault that should be addressed before it escalates. On Genesis specifically, this code is documented across 1 model.
What causes P229F on Genesis vehicles?▼
Common causes on Genesis: Faulty downstream NOx sensor (bank 1 sensor 2), Wiring or connector corrosion at the NOx sensor, Exhaust leak upstream of the sensor, Contaminated or incorrect diesel exhaust fluid (DEF/AdBlue), SCR catalyst degradation. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P229F on a Genesis?▼
Repair costs on Genesis range from $400 to $2,000, depending on the specific model and root cause.
Which Genesis models have P229F documented?▼
Au7o has documented P229F on 1 Genesis model: GV80.