AutoCodes – Saturn – B370A Saturn

B370A Saturn Code - Rain Sensor Internal Malfunction

Quick Answer

B+ voltage is supplied to the windshield outside moisture sensor. Common causes include Faulty Windshield Outside Moisture Sensor (Rain Sensor), Windshield Outside Moisture Sensor harness is open or shorted, Windshield Outside Moisture 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: B370A Saturn indicates Rain Sensor Internal Malfunction.
Common causes: Common causes include Faulty Windshield Outside Moisture Sensor (Rain Sensor), Windshield Outside Moisture Sensor harness is open or shorted, Windshield Outside Moisture 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 984

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 Mar 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B370A Saturn Description

B+ voltage is supplied to the windshield outside moisture sensor. Whenever the ignition is ON, or in accessory positions, the Body Control Module (BCM), sends the wiper/washer switch status by using a Pulse Width Modulated (PWM) signal. When a wipe cycle is needed, the windshield outside moisture sensor sends a PWM voltage signal to the BCM, initiating the wiper operation. The BCM commands the windshield wiper motor wipe cycles. If a fault occurs at any time between the windshield outside moisture sensor and BCM, the BCM will use the inputs from the turn signal/multifunction switch in the delay positions to operate the windshield wiper motor at continuous variable delay intervals. The Diagnostic Trouble Code (DTC) sets when the BCM receives an invalid signal from the Windshield Outside Moisture Sensor.

OBDII Code B370A Saturn - Rain Sensor Internal Malfunction - AutoCodes.com — B370A Saturn Code - Rain Sensor Internal Malfunction

What does this mean?

What are the Possible Causes of the DTC B370A Saturn?

Faulty Windshield Outside Moisture Sensor (Rain Sensor)
Windshield Outside Moisture Sensor harness is open or shorted
Windshield Outside Moisture Sensor circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B370A Saturn?

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 B370A Saturn 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 B370A Saturn code?

Need more information on how to fix the B370A Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B370A Saturn code diagnosed by a professional: Find a repair shop in your area

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 B370A Saturn Code

1. What are the common symptoms of OBDII code B370A Saturn (Rain Sensor Internal Malfunction)?

The common symptoms include the windshield wipers not functioning properly in response to rain, erratic wiper behavior, and the rain sensor not detecting precipitation accurately.

2. What can cause the OBDII code B370A Saturn to trigger (Rain Sensor Internal Malfunction)?

The code B370A Saturn is typically triggered by a malfunction within the rain sensor system, such as a faulty sensor, wiring issues, or a problem with the control module.

3. How can I diagnose the OBDII code B370A Saturn (Rain Sensor Internal Malfunction)?

Diagnosing this code involves checking the rain sensor system for any visible damage, testing the sensor's functionality, inspecting the wiring connections, and using a diagnostic scanner to retrieve specific fault codes.

4. What are some repair tips for fixing the OBDII code B370A Saturn (Rain Sensor Internal Malfunction)?

Repair tips may include cleaning the sensor lens, checking and repairing any damaged wiring, replacing a faulty rain sensor, recalibrating the sensor system, and resetting the trouble codes after repairs are completed.

5. Can I drive my Saturn with the OBDII code B370A (Rain Sensor Internal Malfunction) without causing further damage?

While driving with this code may not cause immediate harm to your vehicle, it is recommended to address the issue promptly to ensure the proper functioning of your rain sensor system.

6. How much does it cost to repair the OBDII code B370A Saturn (Rain Sensor Internal Malfunction)?

The cost of repairing this code can vary depending on the root cause of the issue, the parts needed for replacement, and labor costs. It is advisable to consult with a mechanic for an accurate estimate.

7. Is the OBDII code B370A Saturn (Rain Sensor Internal Malfunction) a common problem in Saturn vehicles?

The B370A code related to rain sensor malfunctions is not as common as other OBDII codes, but it can still occur in Saturn vehicles equipped with rain sensor systems.

8. Can I reset the OBDII code B370A Saturn (Rain Sensor Internal Malfunction) without fixing the underlying issue?

Resetting the code without addressing the root cause may temporarily clear the error code, but the issue is likely to reoccur until the problem with the rain sensor system is fixed.

9. Will the OBDII code B370A Saturn (Rain Sensor Internal Malfunction) affect my vehicle's overall performance?

While the code itself may not directly impact the performance of your vehicle, a malfunctioning rain sensor system can lead to safety concerns during rainy conditions and may affect driver visibility.

10. How long does it take to repair the OBDII code B370A Saturn (Rain Sensor Internal Malfunction)?

The repair time for this code can vary depending on the specific issue causing the malfunction. Simple repairs like cleaning the sensor lens may take a short time, while more complex issues could require more extensive troubleshooting and repair work.