P2480Exhaust Gas Temperature Sensor Circuit/Open (Bank 1 Sensor 5)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2480 is the general circuit or open-circuit fault of a fifth exhaust temperature probe on bank 1. Five probes in one line are rare; GM's small diesels with oxidation catalyst, SCR, second catalyst and filter are among the few layouts that use them. GM does not report P2480 there, however: its 2018 tables detect an interrupted probe 5 inside P2482, by a resistance above 1400 Ω with the output energised, and the 2025 tables treat values beyond 100 MΩ the same way. So no maker documents P2480 publicly; CARB only requires that the circuit be monitored. Typical findings would be a broken lead, a corroded plug near the hot exhaust, or a probe whose element has burned through. Low and High faults of the same probe are P2481 and P2482.
- What you may notice
- Warning lamp on
- Missing or frozen value for probe 5 in live data
- Filter regeneration may be suppressed
- Likely causes
- LikelyBroken or chafed lead to probe 5
- PossibleCorroded or loose connector near the exhaust
- PossibleMeasuring element of the probe burned through
- 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: €40 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.