P0115 OBD II Trouble Code Engine Coolant Temperature Circuit Malfunction
Detailed information on troubleshooting and repairing a p0115 automotive trouble code which refers to a malfunction in the engine coolant temperature circuit. Also includes links to relevant forum topics on the code.
Symptoms of P0115 OBD II Trouble Code
- MIL (Malfunction Indicator Lamp) illumination will always occur
- Vehicle may be hard to start
- May blow a lot of black smoke and run extremely rich
- Engine may want to die or backfire in tailpipe
- Engine may run lean and increased Nox emissions may be apparent (Requires gas analyzer)
- Cooling fans may run all the time when they shouldn't be, or not at all when they should be
Common Causes of P0115 OBD II Trouble Code
- Wiring or connector damaged at sensor
- Open or short in reference or signal circuit
- Open or short in signal circuit
- Bad PCM