P2468Exhaust Gas Temperature Sensor Circuit Low (Bank 2 Sensor 3)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2468 reports that probe 3 in the bank 2 exhaust line delivers a signal below the lowest value the input can produce with an intact circuit. With the usual resistive probes this nearly always means the signal line or the sensor itself has a ground short. No manufacturer lists this bank 2 code publicly; the neighbouring low codes show the scale. Ford's 2023 diesels treat anything below 0.10 V as a fault once ignition is on and supply lies between 9 and 16.25 V, judged within about 2 s, and GM's 2020 diesel tables flag a probe resistance below 158 Ω for sensor 4 as a Type B fault after 10 of 20 samples. CARB demands out-of-range checks for such inputs. Look for chafed insulation against the exhaust or a melted connector. The opposite fault, signal too high or open, is P2469.
- What you may notice
- MIL on
- Probe shows an implausible value at a standstill
- Regeneration or DEF dosing inhibited
- Likely causes
- LikelySignal wire chafed through and touching ground
- PossibleInternal short inside the probe
- RareConnector melted or with water ingress
- 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: €20 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.