Engine-Codes - Generic - B1253

B1253 - Air Temperature Internal Sensor Circuit Short To Ground

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

B1253 Possible Causes

  • Faulty Air Temperature Internal Sensor
  • Air Temperature Internal Sensor harness is open or shorted
  • Air Temperature Internal Sensor circuit poor electrical connection
  • Faulty Electronic Automatic Temperature Control (EATC) Module

How do I fix code B1253?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the B1253 code

Labor: 1.0

The cost of diagnosing the B1253 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1253 Meaning

The Electronic Automatic Temperature Control (EATC) Module monitors the Air Temperature Internal Sensor. The EATC sets the OBDII code when the Air Temperature Internal Sensor is not to factory specifications.

B1253 More Information

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Information for specific makes

  • B1253 FORD Air Temperature Internal Sensor Circuit Short To Ground
  • B1253 LINCOLN Air Temperature Internal Sensor Circuit Short To Ground
  • B1253 MERCURY Air Temperature Internal Sensor Circuit Short To Ground

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