B1257 - Air Temperature External Sensor Circuit Short To Ground

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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B1257 Possible Causes

  • Faulty Air Temperature External Sensor
  • Air Temperature External Sensor harness is open or shorted
  • Air Temperature External Sensor circuit poor electrical connection

First diagnose B1257 code

    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 terminals.

Cost of diagnosing the B1257 code

    Labor: 1.0

    The cost of diagnosing the B1257 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

B1257 Possible Symptoms

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

B1257 Description

The Powertrain Control Module (PCM) monitors the Air Temperature External Sensor. The PCM sets the OBDII code when the Air Temperature External Sensor is not to factory specifications.
OBDII Code B1257 - Air Temperature External Sensor Circuit Short To Ground - AutoCodes.com

B1257 More Information

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