P246B on 2012-2015 Volkswagen Passat — Diesel Particulate Filter Active/Regeneration - Incorrect Conditions/Temperature Too Low - Bank 2
1 vehicles · 1 makes · $300-$3,000 repair
Most Reported On
P246B is an OBD-II diagnostic trouble code meaning “Diesel Particulate Filter Active/Regeneration - Incorrect Conditions/Temperature Too Low - Bank 2.” This code indicates the engine computer detected that conditions were not correct to perform a proper regeneration (burn-off) cycle of the diesel particulate filter (DPF) on bank 2, typically because exhaust temperatures were too low. The DPF traps soot from diesel exhaust and must periodically heat up to roughly 600 C to burn that soot away. When the computer sees inconsistent temperature or sensor data over several drive cycles, it logs this code to warn that the filter cannot clean itself safely. Left unaddressed, the DPF can become clogged and restrict the exhaust. This code is most commonly reported on 2012-2015 Volkswagen Passat, with repair costs ranging from $300 to $3,000.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P246B, 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
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
FAQ
What does P246B mean?
P246B stands for "Diesel Particulate Filter Active/Regeneration - Incorrect Conditions/Temperature Too Low - Bank 2." This code indicates the engine computer detected that conditions were not correct to perform a proper regeneration (burn-off) cycle of the diesel particulate filter (DPF) on bank 2, typically because exhaust temperatures were too low. The DPF traps soot from diesel exhaust and must periodically heat up to roughly 600 C to burn that soot away. When the computer sees inconsistent temperature or sensor data over several drive cycles, it logs this code to warn that the filter cannot clean itself safely. Left unaddressed, the DPF can become clogged and restrict the exhaust.
What are the most common causes of P246B?
The most common causes of P246B are: Short trips / low-speed driving preventing regeneration, Faulty exhaust gas temperature (EGT) sensor, Clogged or aged diesel particulate filter, Faulty DPF differential pressure sensor, Excess soot from a running engine fault (air leak, injector issue), Failed or aborted regeneration cycles, Wiring or connector faults on EGT sensors. The specific cause varies by vehicle.
How much does it cost to fix P246B?
Repair costs for P246B range from $300 to $3,000, depending on the vehicle and root cause.
Which vehicles are affected by P246B?
Au7o has documented P246B across 1 vehicle models from 1 manufacturers: Volkswagen.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.