P2033Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2033 means the signal of exhaust gas temperature sensor 2 on bank 1 is above its valid range. On the Opel/GM 2.0 CDTi in the Saab 9-5 (2010) the sensor in the particulate filter reads high voltage when cold, so more than 1.6 V for over 1 s means an open circuit, an unplugged connector or a short to voltage; it is Type A. GM's 2009 Duramax sets it above 3.37 V, equivalent to 1000 °C, for 300 s, which on that sensor is a short to voltage rather than an open. GM's 2018 diesels use a resistance-equivalent limit above 922 Ω (Type B), Ford's 2023 diesels 2.66 V within 2 s. Sensors near the filter see repeated heat cycles, and their leads and connectors are exposed to road water. The ECM loses the filter temperature and normally stops regeneration, so soot builds up until the fault is fixed.
- What you may notice
- Malfunction indicator lamp on
- DPF regeneration inhibited, soot load rises
- Likely causes
- LikelySensor element open after heat cycling
- PossibleConnector unplugged, loose or corroded
- RareSignal wire shorted to voltage
- 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: €60 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.