P2183Engine Coolant Temperature Sensor 2 Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2183 means sensor 2 delivers a voltage inside the valid band, yet the temperature does not fit the other readings. Most makers test this after a long cold soak, when all temperatures should match. The VW Touareg with engine CNRB sets it when the radiator outlet sensor differs by more than 35 K from intake air, ambient or fuel temperature at start-up. RAM 1500 models with the rear axle heater compare that loop with engine coolant and oil after 8 hours and allow 30 °C; a block heater can trip it falsely. Ford reflashes Escape and Corsair plug-in hybrids where an active cabin heater soak timer set P2183 wrongly. Mazda3 sensors at the radiator bottom let water in and read too low. Real causes are corrosion and drift; others need a software update. Low, high and erratic signals are P2184 to P2186.
- What you may notice
- Check engine light, often right after a cold start
- Remote start disabled on some trucks
- Engine overheat message without real overheating on some hybrids
- Likely causes
- LikelyWater ingress or internal corrosion in sensor 2 shifting its reading
- PossibleControl software misjudging soak time, block heater or cabin heater use
- RareCoolant hoses at the sensor loop swapped or air trapped after service
- RareAged sensor element drifting out of tolerance
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.