AutoCodes – Generic – B1413

B1413 Code - Evaporator Temperature Sensor Circuit

Quick Answer

The No. Common causes include Faulty No, 1 Cooler Thermistor (Evaporator Temperature Sensor), Evaporator Temperature Sensor harness is open or shorted. 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: B1413 indicates Evaporator Temperature Sensor Circuit.
Common causes: Common causes include Faulty No, 1 Cooler Thermistor (Evaporator Temperature Sensor), Evaporator Temperature Sensor harness is open or shorted.
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 29,551

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 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1413 Description

The No. 1 Cooler Thermistor (Evaporator Temperature Sensor) is installed on the evaporator in the air conditioning unit to detect the temperature of the cooled air that has passed through the evaporator and to control the air conditioner. It sends signals to the air conditioning amplifier. The signals change in accordance with the resistance of the No. 1 Cooler Thermistor (Evaporator Temperature Sensor). As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases. The air conditioning amplifier applies a voltage (5 V) to the No. 1 Cooler Thermistor (Evaporator Temperature Sensor) and reads voltage changes as changes in the resistance of the No. 1 Cooler Thermistor (Evaporator Temperature Sensor). This sensor is used for frost prevention.
The Diagnostic Trouble Code (DTC) will be set when the Air Conditioning Amplifier Assembly detects an open or short in the No. 1 Cooler Thermistor (Evaporator Temperature Sensor) circuit.

OBDII Code B1413 - Evaporator Temperature Sensor Circuit - AutoCodes.com — B1413 Code - Evaporator Temperature Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B1413?

Faulty No. 1 Cooler Thermistor (Evaporator Temperature Sensor)
Evaporator Temperature Sensor harness is open or shorted
Evaporator Temperature Sensor circuit poor electrical connection
Faulty Air Conditioning Amplifier

How to Fix the DTC B1413?

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 B1413 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 B1413 code?

Need more information on how to fix the B1413 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1413 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1413 Ford — Frontal Restraints Sensor
B1413 Lexus — Evaporator Temperature Sensor Circuit
B1413 Lincoln — Frontal Restraints Sensor
B1413 Mercury — Frontal Restraints Sensor
B1413 Scion — Evaporator Temperature Sensor Circuit
B1413 Toyota — Evaporator Temperature Sensor Circuit

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 B1413 Code

1. What does the OBDII code B1413 mean?

The B1413 code indicates an issue with the evaporator temperature sensor circuit, which monitors the temperature of the evaporator core in the HVAC system.

2. What are the common symptoms of the B1413 code?

Symptoms may include improper air conditioning performance, inability to regulate cabin temperature, or the HVAC system not functioning at all.

3. What causes the B1413 code to appear?

Common causes include a faulty evaporator temperature sensor, damaged wiring or connectors, or a malfunctioning HVAC control module.

4. How do I diagnose the B1413 code?

Start by visually inspecting the evaporator temperature sensor, wiring, and connectors for damage. Use a scan tool to check sensor readings and verify if the circuit is functioning properly.

5. Can I drive with the B1413 code?

Yes, you can drive, but the HVAC system may not function correctly, leading to discomfort in extreme temperatures.

6. How do I fix the B1413 code?

Repairs may involve replacing the evaporator temperature sensor, repairing or replacing damaged wiring, or reprogramming or replacing the HVAC control module if necessary.

7. How much does it cost to repair the B1413 code?

Repair costs vary but typically range from $100 to $300, depending on whether the sensor, wiring, or control module requires replacement.

8. Can I reset the B1413 code without repairs?

You can clear the code with a scan tool, but it will likely return if the underlying issue is not resolved.

9. What tools are needed to troubleshoot the B1413 code?

Tools may include a multimeter, an OBDII scan tool, and access to the vehicleâ€™s wiring diagram for the HVAC system.

10. Is the B1413 code specific to certain vehicles?

No, the B1413 code can appear on various makes and models, but the exact repair steps may vary depending on the vehicle. Always refer to the manufacturerâ€™s service manual for guidance.