AutoCodes – RAM – B1604 RAM

B1604 RAM Code - Right Solar Sensor Circuit Low

Quick Answer

The Heating Ventilation and Air Conditioning (HVAC) A/C Heater Module uses a variety of sensors to adjust HVAC operation to obtain optimal performance. Common causes include Faulty Right Solar Sensor, Right Solar Sensor harness is open or shorted, Right Solar 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: B1604 RAM indicates Right Solar Sensor Circuit Low.
Common causes: Common causes include Faulty Right Solar Sensor, Right Solar Sensor harness is open or shorted, Right Solar 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 928

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 May 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1604 RAM Description

The Heating Ventilation and Air Conditioning (HVAC) A/C Heater Module uses a variety of sensors to adjust HVAC operation to obtain optimal performance. These sensors are continuously monitored by the A/C Heater Module to assure that they are in range. The A/C Heater Control monitors the Right Solar Sensor. If the Right Sunload Sensor input is out of range toward the low voltage threshold, the A/C Heater Control will set the OBDII code.

OBDII Code B1604 RAM - Right Solar Sensor Circuit Low - AutoCodes.com — B1604 RAM Code - Right Solar Sensor Circuit Low

What does this mean?

What are the Possible Causes of the DTC B1604 RAM?

Faulty Right Solar Sensor
Right Solar Sensor harness is open or shorted
Right Solar Sensor circuit poor electrical connection
Faulty Heating Ventilation and Air Conditioning (HVAC) A/C Heater Module

How to Fix the DTC B1604 RAM?

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 B1604 RAM 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 B1604 RAM Code

1. What are common symptoms of OBDII code B1604 RAM (Right Solar Sensor Circuit Low)?

The common symptoms include dashboard warning lights illuminated, automatic light sensor malfunction, and inconsistent automatic headlight operation.

2. What are the possible causes of OBDII code B1604 RAM?

Possible causes of this code include a faulty right solar sensor, damaged wiring or connectors in the solar sensor circuit, or issues with the sensor calibration.

3. How can I diagnose the issue related to OBDII code B1604 RAM?

You can diagnose the issue by visually inspecting the solar sensor and its wiring, checking for any visible damage or loose connections. Using a multimeter to test the sensor's resistance can also help pinpoint the problem.

4. Can a DIY enthusiast repair OBDII code B1604 RAM?

DIY enthusiasts can attempt to repair this code by replacing the right solar sensor, repairing any damaged wiring or connectors, or recalibrating the sensor following the manufacturer's instructions.

5. Is it safe to drive with OBDII code B1604 RAM active?

While your vehicle may still be operational with this code, it is recommended to address the issue promptly to ensure proper functioning of the automatic lighting system and to prevent any future complications.

6. How much does it typically cost to repair OBDII code B1604 RAM?

The cost of repairing this code can vary depending on the underlying issue, but it may range from $100 to $300 for parts and labor if done at a professional auto repair shop.

7. Can extreme weather conditions affect the right solar sensor and trigger OBDII code B1604 RAM?

Yes, extreme weather conditions such as extreme heat or cold can potentially affect the performance of the solar sensor, leading to triggering of this fault code.

8. Will resetting the OBDII system clear the B1604 RAM code?

While resetting the OBDII system may temporarily clear the code, it is important to address the root cause of the issue to prevent the code from reappearing in the future.

9. How long does it take to repair OBDII code B1604 RAM?

The repair time for this code can vary depending on the extent of the issue and the availability of parts, but it typically takes 1-2 hours for a professional technician to diagnose and fix the problem.

10. Can a damaged right solar sensor impact other vehicle systems?

A damaged right solar sensor can potentially impact other vehicle systems that rely on ambient light sensing, such as the automatic climate control system or the automatic windshield wipers.