B1412 Toyota 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 Toyota 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.
Code B1412 Toyota Description
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.
What are the Possible Causes of the DTC B1412 Toyota?
- 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 Toyota?
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 B1412 Toyota 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.
Need more information about the B1412 Toyota code?
Need more information on how to fix the B1412 Toyota code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1412 Toyota code diagnosed by a professional: Find a repair shop in your area
Information for Specific Toyota Models
- B1412 2013 Toyota RAV4 — Ambient Temperature Sensor Circuit
- B1412 2014 Toyota RAV4 — Ambient Temperature Sensor Circuit
- B1412 2015 Toyota RAV4 — Ambient Temperature Sensor Circuit
- B1412 2016 Toyota RAV4 — Ambient Temperature Sensor Circuit
- B1412 2017 Toyota RAV4 — Ambient Temperature Sensor Circuit
- B1412 2018 Toyota RAV4 — Ambient Temperature Sensor Circuit
Frequently Asked Questions about B1412 Toyota Code
1. What are the common symptoms of OBDII code B1412 Toyota Ambient Temperature Sensor Circuit?
- Common symptoms include inaccurate temperature readings on the dashboard, issues with the climate control system, and potential impact on fuel efficiency.
2. What are the possible causes of OBDII code B1412 in a Toyota related to the Ambient Temperature Sensor Circuit?
- Possible causes include a faulty ambient temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor's calibration.
3. How can I diagnose the Ambient Temperature Sensor Circuit issue causing OBDII code B1412 in my Toyota?
- You can diagnose the issue by visually inspecting the sensor and its connections, checking for any visible damage or corrosion. Using a multimeter to test the sensor's resistance and voltage output can also help pinpoint the problem.
4. Can I drive my Toyota with OBDII code B1412 related to the Ambient Temperature Sensor Circuit?
- It is generally safe to drive your vehicle with this code, but it is recommended to address the issue promptly to avoid potential impacts on the climate control system's functionality.
5. Is it possible to reset the OBDII code B1412 in a Toyota without fixing the Ambient Temperature Sensor Circuit issue?
- While you can clear the code using an OBDII scanner, the underlying problem with the ambient temperature sensor circuit will persist until properly diagnosed and repaired.
6. What are some repair tips for fixing OBDII code B1412 Toyota Ambient Temperature Sensor Circuit issue?
- Start by checking the sensor's wiring and connectors for any damage or looseness. If no visible issues are found, consider replacing the ambient temperature sensor itself.
7. How much does it typically cost to repair the Ambient Temperature Sensor Circuit issue causing OBDII code B1412 in a Toyota?
- The cost of repair can vary depending on the extent of the issue and whether you choose to do the repair yourself or take it to a professional. Generally, replacing the ambient temperature sensor can range from $50 to $150, including parts and labor.
8. Will fixing the Ambient Temperature Sensor Circuit issue causing OBDII code B1412 improve my Toyota's fuel efficiency?
- Yes, resolving the ambient temperature sensor circuit issue can help improve fuel efficiency by ensuring the engine operates at the optimal temperature and the climate control system functions correctly.
9. Can extreme weather conditions affect the ambient temperature sensor and trigger OBDII code B1412 in a Toyota?
- Yes, extreme temperatures or exposure to harsh weather conditions can potentially damage the ambient temperature sensor or its wiring, leading to the triggering of OBDII code B1412.
10. How long does it typically take to repair the Ambient Temperature Sensor Circuit issue causing OBDII code B1412 in a Toyota?
- The repair process can usually be completed within a few hours, including diagnosis, part replacement, and testing to ensure the issue is resolved.
Discuss the causes and fixes for B1412 Toyota OBDII Code
Code B1412 Toyota comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
