P2BAC on Land Rover
NOx Exceedence - Deactivation of EGR
P2BAC on Land Rover vehicles indicates nox exceedence - deactivation of egr. Au7o has documented this code across 1 Land Rover model — most commonly on Range Rover Velar. This emissions code indicates the engine computer detected that nitrogen oxide (NOx) emissions exceeded the permitted limit because the exhaust gas recirculation (EGR) system was deactivated or not operating, typically on diesel engines. The EGR system lowers NOx by recirculating exhaust into the intake; if it is shut off or non-functional, NOx output climbs past the calibrated threshold. The computer logs this to protect emissions compliance, and on many diesels persistent faults can lead to power reduction or no-restart conditions. Typical repair costs on Land Rover range from $500 to $2,000, depending on the specific model and root cause.
Common Causes of P2BAC
- •EGR valve stuck closed or disabled
- •Carbon-clogged EGR passages
- •EGR control or position sensor fault
- •Wiring/connector fault disabling EGR
- •Vacuum supply problem on EGR actuator
- •Faulty NOx sensor
- •EGR cooler or related component failure
P2BAC on Land Rover by Model
Land Rover Range Rover Velar(1 issue)
- AdBlue/DEF System Faults and Injector Crystallization2018-2024
The diesel Velar models are prone to AdBlue (DEF) system faults caused by the AdBlue injector crystallizing. Crystallized AdBlue blocks the injector and prevents proper urea injection into the exhaust, triggering a countdown to engine restart lockout. The AdBlue heater and level sensor also fail, giving false empty readings even with a full tank.
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View P2BAC across all makes →Frequently Asked Questions
What does P2BAC mean on Land Rover?▼
P2BAC stands for "NOx Exceedence - Deactivation of EGR." This emissions code indicates the engine computer detected that nitrogen oxide (NOx) emissions exceeded the permitted limit because the exhaust gas recirculation (EGR) system was deactivated or not operating, typically on diesel engines. The EGR system lowers NOx by recirculating exhaust into the intake; if it is shut off or non-functional, NOx output climbs past the calibrated threshold. The computer logs this to protect emissions compliance, and on many diesels persistent faults can lead to power reduction or no-restart conditions. On Land Rover specifically, this code is documented across 1 model.
What causes P2BAC on Land Rover vehicles?▼
Common causes on Land Rover: EGR valve stuck closed or disabled, Carbon-clogged EGR passages, EGR control or position sensor fault, Wiring/connector fault disabling EGR, Vacuum supply problem on EGR actuator. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2BAC on a Land Rover?▼
Repair costs on Land Rover range from $500 to $2,000, depending on the specific model and root cause.
Which Land Rover models have P2BAC documented?▼
Au7o has documented P2BAC on 1 Land Rover model: Range Rover Velar.