P2182
Engine Coolant Temperature Sensor 2 Circuit
- Severity
- Medium
- Driving
- Drivable — book it in
A fault in the second engine coolant temperature sensor circuit. Many engines use two, at different points in the cooling system, so the module can see both what is entering the engine and what is leaving it.
Possible causes
- CommonFailed coolant temperature sensor
- CommonCorroded connector or damaged wiring
- CommonLow coolant level, leaving the sensor uncovered
- CommonAir lock in the cooling system after a previous repair
- PossibleLoss of reference voltage or earth
- PossibleThermostat fault, so the temperature genuinely is wrong
What you might notice
- Temperature gauge wrong or erratic
- Cooling fans running constantly or not at all
- Poor fuel economy
- Hard starting
- Heater blowing cool
- Check engine light on
What to check, in order
- Compare the reported temperature with the other coolant sensor and with ambient on a vehicle that has stood overnight. All should agree closely when cold.
- Check the coolant level and look for leaks. A low level uncovers the sensor and produces these codes with a good sensor.
- Inspect the connector for corrosion.
- Check the reference voltage and earth at the sensor.
- Watch the temperature climb from cold on a drive - it should rise smoothly and settle.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Fuel and air metering
P2100P2101P2102P2103P2104P2105P2106P2107P2108P2109P2110P2111P2112P2113P2114P2115P2116P2117P2118P2119P2120P2121P2122P2123P2124P2125P2126P2127P2128P2129P2130P2131P2132P2133P2134P2135P2136P2137P2138P2139P2140P2141P2142P2143P2144P2145P2146P2147P2148P2149P2150P2151P2152P2153P2154P2155P2156P2157P2158P2159P2160P2161P2162P2163P2164P2165P2166P2167P2168P2169P2170P2171P2172P2173P2174P2175P2176P2177P2178P2179P2180P2181P2182P2183P2184P2185P2186P2187P2188P2189P2190P2191P2192P2193P2194P2195P2196P2197P2198P2199