P2052Reductant Injection Valve Circuit High (Bank 2 Unit 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2052 tells that battery potential is present on the switched line of the first Bank 2 injector, for example through a short to a powered wire or moisture bridging connector pins. It belongs to twin-bank SCR layouts in which each cylinder bank owns an injector; publicly, no manufacturer documents this code or its thresholds. For the matching Bank 1 code P2049, GM's 2014 Cruze diesel uses Type B (two trips) and the Deutz EMR5 list describes voltage above normal or a short to the high source, so P2052 would presumably follow the same logic. A driver that sees a short to positive normally switches off to protect itself, leaving the second branch without DEF. CARB's comprehensive-component rules apply; check plug, harness and coil resistance first.
- What you may notice
- MIL on, possibly after two trips
- No DEF on Bank 2
- Higher tailpipe NOx
- Likely causes
- LikelyControl line of the Bank 2 injector touching a supply wire
- PossibleMoisture bridging pins in the Bank 2 injector plug
- RareFaulty output stage for the Bank 2 valve
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.