P2486Exhaust Gas Temperature Sensor Circuit Low (Bank 2 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
- P2486 is set when the signal of the fifth bank 2 exhaust probe sits below its lower electrical limit, typically because the lead or the probe itself shorts to ground. No manufacturer documents P2486 publicly; it presupposes two exhaust banks with five probes each. As an analogy, GM's diesel tables handle bank 1 probe 5 under P2481 with a resistance limit of 158 to 500 Ω depending on the year (under 1 Ω in 2025) and a debounce of 10 of 20 samples, Type B. CARB calls for out-of-range low checks on every such input. In the workshop, measure the probe resistance cold and compare it with a probe of the same type, then look for chafed insulation along the exhaust. Opposite limit: P2487; bank 1: P2481.
- What you may notice
- Engine warning lamp
- Implausible reading of this probe
- Likely causes
- LikelyLead insulation damaged and touching ground
- PossibleInternal short of the probe
- 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.