P2205NOx Sensor Heater Control Circuit/Open (Bank 1 Sensor 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- The ceramic element of a NOx sensor only measures once its built-in heater has brought it to several hundred degrees. P2205 reports a break on the heater control side of the upstream sensor on bank 1. GM's 6.6L Duramax (LML) sets it after the sensor has reported an open heater for over 10 s with at least 11 V; on the 3.0L LZ0 it is an open load on the heater control pin. Both are Type A, so the MIL comes on after one trip. Volvo and Mack treat P2205 on the inlet sensor as a probable sensor failure, and GM bulletin 24-NA-094 lists it for an LZ0 software update on 2024 pickups. P2206 and P2207 are shorts low and high, P220E heater power out of range, P22A3 the downstream sensor.
- What you may notice
- Malfunction indicator lamp on after one trip
- Upstream NOx sensor never becomes ready
- SCR warning on the display
- Likely causes
- LikelyHeater element in the NOx probe burnt through
- PossibleBroken conductor in the lead between probe and sensor module
- RareSoftware anomaly (GM 3.0L LZ0 2024, bulletin 24-NA-094)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €150 – €1,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.