P2BAC on 2018-2024 Land Rover Range Rover Velar — NOx Exceedence - Deactivation of EGR
1 vehicles · 1 makes · $500-$2,000 repair
Most Reported On
P2BAC is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2018-2024 Land Rover Range Rover Velar, with repair costs ranging from $500 to $2,000.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P2BAC, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P2BAC mean?
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.
What are the most common causes of P2BAC?
The most common causes of P2BAC are: 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. The specific cause varies by vehicle.
How much does it cost to fix P2BAC?
Repair costs for P2BAC range from $500 to $2,000, depending on the vehicle and root cause.
Which vehicles are affected by P2BAC?
Au7o has documented P2BAC across 1 vehicle models from 1 manufacturers: Land Rover.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.