AutoCodes – Subaru – B1507 Subaru

B1507 Subaru Code - External Air Temperature Open/Short-Circuit Detection

Quick Answer

The Body Control Module (BCM) monitors the Ambient Sensor. Common causes include Faulty Ambient Sensor, Ambient Sensor harness is open or shorted, Ambient Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1507 Subaru indicates External Air Temperature Open/Short-Circuit Detection.
Common causes: Common causes include Faulty Ambient Sensor, Ambient Sensor harness is open or shorted, Ambient Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 3,919

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 23, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1507 Subaru Description

The Body Control Module (BCM) monitors the Ambient Sensor. The BCM sets the OBDII code when the Ambient Sensor is not to factory specifications.

OBDII Code B1507 Subaru - External Air Temperature Open/Short-Circuit Detection - AutoCodes.com — B1507 Subaru Code - External Air Temperature Open/Short-Circuit Detection

What does this mean?

What are the Possible Causes of the DTC B1507 Subaru?

Faulty Ambient Sensor
Ambient Sensor harness is open or shorted
Ambient Sensor circuit poor electrical connection
Faulty Combination Meter

How to Fix the DTC B1507 Subaru?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1507 Subaru code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1507 Subaru Code

1. What are the common symptoms of OBDII code B1507 in a Subaru related to External Air Temperature Open/Short-Circuit Detection?

- Common symptoms may include inaccurate temperature readings on the vehicle's display, the temperature reading staying at a constant value, or a temperature reading that does not change with external conditions.

2. What are the possible causes of OBDII code B1507 in a Subaru indicating External Air Temperature Open/Short-Circuit Detection?

- Causes may include a damaged or faulty external air temperature sensor, wiring issues such as open circuits or short circuits in the sensor circuit, or a malfunctioning temperature display unit.

3. How can I diagnose OBDII code B1507 related to External Air Temperature Open/Short-Circuit Detection in my Subaru?

- Diagnosis typically involves checking the external air temperature sensor for physical damage, testing the sensor's resistance with a multimeter, inspecting the sensor wiring for continuity and shorts, and verifying the temperature readings against known external temperatures.

4. Is it safe to continue driving with OBDII code B1507 in a Subaru triggered by External Air Temperature Open/Short-Circuit Detection?

- While the vehicle may still be operable, it is recommended to address the issue promptly as inaccurate temperature readings can affect various vehicle systems that rely on this data for optimal performance.

5. Can I repair OBDII code B1507 in a Subaru related to External Air Temperature Open/Short-Circuit Detection myself?

- Depending on your experience and access to tools, you may be able to address this issue yourself by replacing the external air temperature sensor, repairing any damaged wiring, or resetting the temperature display unit. However, professional assistance is recommended if you are unsure.

6. How much does it typically cost to repair OBDII code B1507 in a Subaru indicating External Air Temperature Open/Short-Circuit Detection?

- The cost of repair can vary based on the specific cause of the issue. Replacing the external air temperature sensor may range from $50 to $150, while addressing wiring issues or replacing the temperature display unit could incur additional costs for labor.

7. Are there any preventive measures to avoid triggering OBDII code B1507 related to External Air Temperature Open/Short-Circuit Detection in my Subaru?

- To prevent this issue, it is advisable to inspect the external air temperature sensor and its wiring during routine maintenance checks, ensure proper connections, and protect the sensor from physical damage to maintain accurate temperature readings.