P2186 - OBD II Trouble Code

Our automotive experts have put together the following information about the P2186 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P2186 code.

OBD II Fault Code

• OBD II P2186

OBD-II Code Decreased engine performance is defined as a Engine Coolant Temperature Sensor 2 Circuit Intermittent/Erratic

The Engine Coolant Temperature Sensor measures the temperature of the coolant going through the engine. If the engine's control module (PCM) detects an electrical fault in the Engine Coolant Temperature Circuit, the PCM will set code P2186.

Decreased engine performance Symptoms

• A/C may not operate
• Decreased engine performance
• Increased fuel consumption

Common Problems That Trigger the P2186 Code

• Engine coolant temperature (ECT) sensor failure
• Powertrain Control Module (PCM) failure
• Wiring issue

Common Repairs Needed for the P2186 Code

• Thermostat Replacement
• Engine Coolant Temperature Sensor Replacement