OBD Guide
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C2420

Motor Temperature Sensor High Input

C2420 is an OBD-II diagnostic trouble code meaning: Motor Temperature Sensor High Input. Common causes: motor temperature sensor malfunction, short circuit in wiring harness. Estimated repair cost: $22–111.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–111 (est.)

Symptoms

  • Check Engine Light Is On
  • Unstable operation of the passive safety system
  • Errors in other temperature-related systems

Causes

  • Motor temperature sensor malfunction
  • Short circuit in wiring harness
  • ECU malfunction
  • Poor contact in connectors

How to Fix

  1. Check the engine temperature sensor readings using a diagnostic scanner
  2. Check the integrity of the wiring harness and connectors
  3. Replace the motor temperature sensor if it is faulty
  4. Check and, if necessary, replace the computer

Related codes

C2421C2422B0070

FAQ

What does the C2420 code mean?

C2420 is an OBD-II diagnostic trouble code that indicates: Motor Temperature Sensor High Input

What causes a C2420 error code?

The most common causes of C2420 include: Motor temperature sensor malfunction; Short circuit in wiring harness; ECU malfunction; Poor contact in connectors.

How do I fix a C2420 diagnostic trouble code?

To fix C2420: Check the engine temperature sensor readings using a diagnostic scanner. Check the integrity of the wiring harness and connectors. Replace the motor temperature sensor if it is faulty. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C2420?

Do not drive — repair immediately

How much does it cost to fix C2420?

The estimated repair cost for C2420 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat