OBD Guide
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P111E

Engine Coolant Temperature Sensor Not Plausible

P111E is an OBD-II diagnostic trouble code meaning: Engine Coolant Temperature Sensor Not Plausible. Common causes: coolant temperature sensor malfunction, open or short circuit in wiring. Estimated repair cost: $6–33.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–33 (est.)

Symptoms

  • Unstable engine operation at idle
  • Increased fuel consumption
  • Problems starting the engine
  • Incorrect temperature readings on the dashboard
  • Engine overheating

Causes

  • Coolant temperature sensor malfunction
  • Open or short circuit in wiring
  • Poor contact in the sensor connector
  • Contact corrosion
  • Engine control unit malfunction

How to Fix

  1. Check sensor resistance at different temperatures
  2. Inspect the sensor wiring and connectors
  3. Check for corrosion on contacts
  4. Replace the coolant temperature sensor if necessary
  5. Check the operation of the engine control unit

Related codes

P0115P0116P0117P0118

FAQ

What does the P111E code mean?

P111E is an OBD-II diagnostic trouble code that indicates: Engine Coolant Temperature Sensor Not Plausible

What causes a P111E error code?

The most common causes of P111E include: Coolant temperature sensor malfunction; Open or short circuit in wiring; Poor contact in the sensor connector; Contact corrosion.

How do I fix a P111E diagnostic trouble code?

To fix P111E: Check sensor resistance at different temperatures. Inspect the sensor wiring and connectors. Check for corrosion on contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P111E?

Yes, but get it checked soon

How much does it cost to fix P111E?

The estimated repair cost for P111E is $6–33. Actual cost depends on your vehicle, location, and labor rates.

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