Error code

OBD2 P2185

OBD2P2185
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Engine Coolant Temperature Sensor 2 Circuit High.

Severity

severeCan drive but risk of engine overheating is high. Address immediately.

Summary

P2185 indicates that Engine Coolant Temperature Sensor 2 is reporting an abnormally high voltage to the PCM, likely near or at the radiator outlet.

Symptoms

  • Stored trouble code and illuminated warning light
  • Radiator fans may run continuously or not at all regardless of actual coolant temperature
  • Potential engine overheating without dashboard temperature gauge showing abnormal readings

Common Causes

  • Damaged, burnt, shorted, disconnected, or corroded wiring in the sensor's circuit
  • Defective Engine Coolant Temperature Sensor 2
  • Use of aftermarket coolant temperature sensors
  • Failed PCM (rare)

Diagnosis

  1. Inspect and test the wiring harness for shorts to battery positive or other issues
  2. Check Engine Coolant Temperature Sensor 2 for physical damage or malfunction
  3. Verify that no aftermarket sensors are installed

Fixes

  • Replace faulty Engine Coolant Temperature Sensor 2

FAQ

Can I drive with P2185?

Yes, but the risk of engine overheating is high. Address the issue promptly to avoid damage.

What causes P2185?

Common causes include wiring issues, a faulty sensor, or using aftermarket sensors.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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