AutoCodes – Cadillac – B0163 Cadillac

B0163 Cadillac Code - Passenger Compartment Temperature Sensor Circuit

Quick Answer

The ambient light/sunload sensor integrates the sunload sensor and passenger compartment temperature sensor into a single assembly. Common causes include Faulty Ambient Light/Sunload Sensor, Ambient Light/Sunload Sensor harness is open or shorted, Ambient Light/Sunload Sensor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0163 Cadillac indicates Passenger Compartment Temperature Sensor Circuit.
Common causes: Common causes include Faulty Ambient Light/Sunload Sensor, Ambient Light/Sunload Sensor harness is open or shorted, Ambient Light/Sunload Sensor circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 2,083

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 10, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0163 Cadillac Description

The ambient light/sunload sensor integrates the sunload sensor and passenger compartment temperature sensor into a single assembly.
The solar sensor is connected to a low reference and a 5 V biased (pull-up) signal circuit voltage from the Heating, Ventilation, and Air Conditioning (HVAC) Control Module. As the sunload increases, the sensor signal voltage decreases. The signal varies between 0.1 - 4.9 V and is provided to the HVAC control module.
The passenger compartment temperature sensor is a negative temperature coefficient thermistor. A signal and low reference circuit enable the sensor to operate. As the air temperature increases, the sensor resistance decreases. The sensor signal varies between 0 - 5 V.
Bright or high-intensity light causes the vehicle's interior temperature to increase. The HVAC system compensates for the increased temperature by diverting additional cool air into the vehicle.

OBDII Code B0163 Cadillac - Passenger Compartment Temperature Sensor Circuit - AutoCodes.com — B0163 Cadillac Code - Passenger Compartment Temperature Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B0163 Cadillac?

Faulty Ambient Light/Sunload Sensor
Ambient Light/Sunload Sensor harness is open or shorted
Ambient Light/Sunload Sensor circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0163 Cadillac?

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

B0163:02 Passenger Compartment Temperature Sensor Circuit Short to Ground
B0163:05 Passenger Compartment Temperature Sensor Circuit Short to Battery or Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0163 Cadillac 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 B0163 Cadillac Code

1. What are common symptoms of OBDII code B0163 in a Cadillac related to the Passenger Compartment Temperature Sensor Circuit?

- Common symptoms include inaccurate interior temperature readings on the climate control system, inconsistent heating or cooling performance, and automatic climate control malfunctions.

2. What could cause the OBDII code B0163 to trigger in a Cadillac?

- The code B0163 in a Cadillac is typically triggered by a faulty passenger compartment temperature sensor, damaged wiring or connectors in the sensor circuit, or a failed HVAC control module.

3. How can I diagnose the root cause of OBDII code B0163 in my Cadillac?

- To diagnose the issue, you can use a diagnostic scanner to read the specific code, visually inspect the sensor and its wiring for any visible damage, and perform circuit testing to check for continuity and proper voltage.

4. What are some repair tips for resolving OBDII code B0163 in a Cadillac?

- Repair tips include replacing the faulty passenger compartment temperature sensor, repairing or replacing damaged wiring or connectors, and resetting the HVAC control module after making necessary repairs.

5. Can I drive my Cadillac with OBDII code B0163 present?

- It is generally safe to drive with the B0163 code, but you may experience issues with the climate control system's accuracy and performance. It is advisable to address the problem promptly to ensure optimal comfort and functionality.

6. How much does it typically cost to repair OBDII code B0163 in a Cadillac?

- The cost of repairing OBDII code B0163 in a Cadillac can vary depending on the root cause of the issue, the need for replacement parts, and labor costs. Overall, the repair cost may range from $100 to $300 on average.

7. Can I reset OBDII code B0163 in my Cadillac without fixing the underlying issue?

- While you can clear the code temporarily by resetting the system, the code is likely to reoccur if the underlying issue with the passenger compartment temperature sensor circuit is not addressed.

8. How long does it take to repair OBDII code B0163 in a Cadillac?

- Repair times can vary based on the extent of the issue and the expertise of the person performing the repair. On average, resolving OBDII code B0163 may take around 1 to 2 hours.

9. Is OBDII code B0163 specific to Cadillac vehicles only?

- OBDII code B0163 related to the Passenger Compartment Temperature Sensor Circuit can be found in various vehicle makes and models, not limited to Cadillac. It is a generic code used across the automotive industry.

10. Can I prevent OBDII code B0163 from recurring in my Cadillac?

- To prevent the recurrence of OBDII code B0163, it's essential to ensure proper maintenance of the climate control system, regularly check the sensor and its connections for any issues, and address any related problems promptly.