DTCs P225E00 & P20EE00 via Orbit, - Printable Version +- OrBit Forums (https://forums.spaycetech.com) +-- Forum: Configuration Items (https://forums.spaycetech.com/forumdisplay.php?fid=3) +--- Forum: Engine / Transmission (https://forums.spaycetech.com/forumdisplay.php?fid=8) +--- Thread: DTCs P225E00 & P20EE00 via Orbit, (/showthread.php?tid=1445)

DTCs P225E00 & P20EE00 via Orbit, - mmati8 - 09-16-2026 Hi everyone, I’m looking for some advice regarding my Volvo D4 FWD, 2.0 190PS, 2019, 174.000KM l scanned the car using Orbit and got these two active fault codes in the ECM: P225E00 – NOx Sensor Performance - Signal Stuck High Bank 1 Sensor 2 P20EE00 – SCR NOx Catalyst Efficiency Below Threshold (Bank 1) Timeline & Symptoms: 3,000 km ago: After a long, fast highway trip driving at 160-170 km/h, I first noticed a gray ash/soot buildup on the exhaust tips. Today: While driving, I got a Check Engine light, noticed a strong, distinct ammonia/urea (AdBlue) smell from the exhaust, and saw a significant puff of gray smoke under acceleration (which later disappeared). My questions: Does this diagnostics via Orbit point directly to a failing rear NOx sensor (Sensor 2) that needs to be replaced, or could this be a secondary consequence of something else, like a clogged DPF or a failing SCR catalyst? Is there anything else I should check, reset, or perform in Orbit regarding these codes before or after replacing the sensor? Any insights or similar experiences would be greatly appreciated! Thanks in advance. Thnx, Mati