AutoCodes – Toyota – B1412 2017 Toyota RAV4

B1412 2017 Toyota RAV4 Code - Ambient Temperature Sensor Circuit

Quick Answer

The Cooler Thermistor (Ambient Temperature Sensor) is installed in front of the condenser to detect the ambient temperature which is used to control the air conditioning system AUTO mode. Common causes include Faulty Cooler Thermistor (Ambient Temperature Sensor), Ambient Temperature Sensor harness is open or shorted, Ambient Temperature 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: B1412 2017 Toyota RAV4 indicates Ambient Temperature Sensor Circuit.
Common causes: Common causes include Faulty Cooler Thermistor (Ambient Temperature Sensor), Ambient Temperature Sensor harness is open or shorted, Ambient Temperature 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 2,017

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 Sep 19, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B1412 2017 Toyota RAV4 Description

The Cooler Thermistor (Ambient Temperature Sensor) is installed in front of the condenser to detect the ambient temperature which is used to control the air conditioning system AUTO mode. This sensor is connected to the air conditioning amplifier assembly and detects fluctuations in the ambient temperature. This data is used for controlling the cabin temperature. The sensor sends a signal to the air conditioning amplifier assembly. The resistance of the Cooler Thermistor (Ambient Temperature Sensor) changes in accordance with the ambient temperature. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.
The air conditioning amplifier assembly applies a voltage (5 V) to the Cooler Thermistor (Ambient Temperature Sensor) and reads voltage changes due to changes in the resistance of the Cooler Thermistor (Ambient Temperature Sensor). The combination meter assembly sends the read signal to the air conditioning amplifier via CAN communication.
The Diagnostic Trouble Code (DTC) will be set when the Air Conditioning Amplifier Assembly detects an open or short in the Cooler Thermistor (Ambient Temperature Sensor) circuit.

OBDII Code B1412 2017 Toyota RAV4 - Ambient Temperature Sensor Circuit - AutoCodes.com — B1412 2017 Toyota RAV4 Code - Ambient Temperature Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B1412 2017 Toyota RAV4?

Faulty Cooler Thermistor (Ambient Temperature Sensor)
Ambient Temperature Sensor harness is open or shorted
Ambient Temperature Sensor circuit poor electrical connection
Faulty Air Conditioning Amplifier Assembly

How to Fix the DTC B1412 2017 Toyota RAV4?

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 does this mean?

Code Tech Notes

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1412 2017 Toyota RAV4 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 B1412 2017 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B1412 in a 2017 Toyota RAV4?

The common symptoms of OBDII code B1412 in a 2017 Toyota RAV4 include inaccurate ambient temperature readings on the dashboard, issues with the climate control system, and potential activation of the Check Engine Light.

2. What can cause the Ambient Temperature Sensor Circuit issue (B1412) in a 2017 Toyota RAV4?

The Ambient Temperature Sensor Circuit issue (B1412) in a 2017 Toyota RAV4 can be caused by a faulty ambient temperature sensor, damaged wiring or connectors, or a malfunction in the climate control module.

3. How can I diagnose the Ambient Temperature Sensor Circuit issue (B1412) in my 2017 Toyota RAV4?

To diagnose the Ambient Temperature Sensor Circuit issue (B1412) in your 2017 Toyota RAV4, you can use an OBDII scanner to retrieve the specific trouble code, visually inspect the sensor and its connections for any signs of damage, and perform continuity tests on the wiring.

4. Can I repair the Ambient Temperature Sensor Circuit issue (B1412) in my 2017 Toyota RAV4 myself?

Repairing the Ambient Temperature Sensor Circuit issue (B1412) in your 2017 Toyota RAV4 yourself is possible, especially if you have experience with automotive electrical systems. However, it's recommended to consult a professional mechanic for an accurate diagnosis and proper repair.

5. Is it safe to continue driving my 2017 Toyota RAV4 with OBDII code B1412?

While it may be safe to continue driving your 2017 Toyota RAV4 with OBDII code B1412, it's crucial to address the underlying issue promptly to prevent further damage to the ambient temperature sensor or related components.

6. How much does it typically cost to repair the Ambient Temperature Sensor Circuit issue (B1412) in a 2017 Toyota RAV4?

The cost of repairing the Ambient Temperature Sensor Circuit issue (B1412) in a 2017 Toyota RAV4 can vary depending on the extent of the damage and the labor rates of the repair shop. Typically, the cost ranges from $100 to $300 for parts and labor.

7. Can extreme weather conditions affect the Ambient Temperature Sensor Circuit in a 2017 Toyota RAV4?

Yes, extreme weather conditions such as extreme heat or cold can potentially affect the Ambient Temperature Sensor Circuit in a 2017 Toyota RAV4, leading to inaccurate ambient temperature readings or sensor malfunctions.

8. Will resetting the Check Engine Light resolve the OBDII code B1412 in a 2017 Toyota RAV4?

Resetting the Check Engine Light may temporarily clear the code, but it will not resolve the underlying issue causing the OBDII code B1412 in a 2017 Toyota RAV4. It's important to diagnose and repair the root cause of the problem.

9. How long does it take to repair the Ambient Temperature Sensor Circuit issue (B1412) in a 2017 Toyota RAV4?

The repair time for the Ambient Temperature Sensor Circuit issue (B1412) in a 2017 Toyota RAV4 can vary depending on the complexity of the repair and the availability of parts. Generally, it can take anywhere from 1 to 3 hours to complete the repair.

10. Can a damaged Ambient Temperature Sensor impact other vehicle systems in a 2017 Toyota RAV4?

Yes, a damaged Ambient Temperature Sensor in a 2017 Toyota RAV4 can potentially impact other vehicle systems such as the climate control system, resulting in issues with temperature regulation and overall comfort while driving.