Engine-Codes - Generic - B1257

B1257 Code - Air Temperature External Sensor Circuit Short To Ground

- Code Popularity: 10,669 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B1257?

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

|How to Fix the B1257 Code?

Start by checking 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.

|What is the Cost to Diagnose the Code B1257?

Labor: 1.0

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

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|What are Code B1257 Possible Symptoms?

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

|What Does the B1257 Code Mean?

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.

B1257 Code - Air Temperature External Sensor Circuit Short To Ground

|Need more Information on the B1257 Code?

Need more information on how to fix the B1257 code? Get Access to Factory Service Manuals

|Need Help with the B1257 Code?

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