B0163:02 Code - Passenger Compartment Temperature Sensor Circuit Short to Ground
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
- B0163:02 indicates Passenger Compartment Temperature Sensor Circuit Short to Ground.
- 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.
Code B0163:02 Description
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.
The Diagnostic Trouble Code (DTC) will be set when the HVAC control module detects the sensor signal out of range. The signal voltage is less than 0.1 V for more than 50 ms.
What are the Possible Causes of the DTC B0163:02?
- 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 B0163:02?
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.
Code Tech Notes
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 B0163:02 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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Frequently Asked Questions about B0163:02 Code
1. What are common symptoms of OBDII code B0163:02 (Passenger Compartment Temperature Sensor Circuit Short to Ground)?
The common symptoms include inaccurate temperature readings on the climate control system, inconsistent heating or cooling of the passenger compartment, or the climate control system not responding properly.
2. What are the possible causes of OBDII code B0163:02?
Possible causes include a short circuit in the wiring of the passenger compartment temperature sensor, a faulty temperature sensor, or damaged wiring harnesses.
3. How can I diagnose OBDII code B0163:02?
Diagnosis involves using a scan tool to retrieve the code, checking the wiring and connectors for any obvious damage, testing the temperature sensor for proper resistance values, and verifying the sensor's signal at the climate control module.
4. How can I repair OBDII code B0163:02?
Repair options may include repairing or replacing damaged wiring, replacing the passenger compartment temperature sensor, or addressing any underlying issues that caused the short to ground.
5. Can I drive my vehicle with OBDII code B0163:02 present?
It is generally safe to drive with this code, but you may experience discomfort due to the climate control system not functioning correctly. It is recommended to address the issue promptly to ensure proper cabin temperature control.
6. Are there any DIY repair tips for OBDII code B0163:02?
If you have the necessary tools and skills, you can attempt to inspect the wiring and connectors yourself, check for visible damage, and replace the temperature sensor if needed. However, it's best to consult a professional if you're unsure.
7. How much does it cost to fix OBDII code B0163:02?
The cost of fixing this code can vary depending on the underlying issue, the cost of parts, and labor rates. It's advisable to get a diagnostic assessment from a qualified mechanic to determine the exact cost.
8. Is OBDII code B0163:02 a serious issue?
While it may not pose an immediate danger to the vehicle, OBDII code B0163:02 can impact the comfort and functionality of the climate control system. Addressing the issue in a timely manner is recommended to maintain optimal cabin temperature control.
9. Can extreme temperatures affect the occurrence of OBDII code B0163:02?
Extreme temperatures can potentially exacerbate issues related to the passenger compartment temperature sensor, such as causing wiring to expand or contract, leading to shorts or poor connections. Proper insulation and maintenance can help mitigate these effects.
10. Can OBDII code B0163:02 be intermittent?
Yes, this code can manifest intermittently, especially if the underlying issue is related to loose connections or wiring. It's important to monitor the symptoms and address the problem promptly to prevent further complications.
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