AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Generic - B1257

B1257 Code - Air Temperature External Sensor Circuit Short To Ground

- Code Popularity: 13,087 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC B1257?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Air Temperature External Sensor
  • Air Temperature External Sensor harness is open or shorted
  • Air Temperature External Sensor circuit poor electrical connection
⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC B1257?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for B1257 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1257 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code 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 Code - Air Temperature External Sensor Circuit Short To Ground

Need More Information on the Code?

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

Need Help with the Code?

Get the B1257 code diagnosed by a professional: Find a repair shop in your area

Code B1257 comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the B1257 code? Have you replaced any parts?
Any information is appreciated. Thanks