P2EB9Reductant Injection Valve Circuit Range/Performance Bank 2 Unit 2
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2EB9 is the bank 2 twin of P2EAE: the circuit of the second DEF injector on the second exhaust bank works electrically, but its signal does not match a valve that opens and closes as it should. Bank 2 implies a separate exhaust line for the second cylinder bank, and unit 2 a further dosing point on that line. No manufacturer documents P2EB9 publicly. GM's 3.0 L Duramax LZ0 shows how such a test runs for bank 1 unit 2: it takes the second derivative of the injector current and fails when too few injections show the armature moving. Delphi's patent US11280245 describes the same kink detection. Open circuit, low and high on this injector are P2056 to P2058. Usual causes are crystal deposits, a sticking armature and corroded contacts; NOx emissions can then exceed the limits.
- What you may notice
- Check engine lamp on
- DEF system warning
- Higher NOx emissions
- Likely causes
- LikelyArmature sticking from urea crystals
- PossibleCorroded contacts distorting the current trace
- RareInjector coil with changed characteristics
- 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.