B138A Buick Code - Control Module Voltage Reference Output Circuit
Quick Answer
The object sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. Common causes include Faulty Rear Parking Assist Alarm Sensor, Rear Parking Assist Alarm Sensor harness is open or shorted, Rear Parking Assist Alarm 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
- B138A Buick indicates Control Module Voltage Reference Output Circuit.
- Common causes
- Common causes include Faulty Rear Parking Assist Alarm Sensor, Rear Parking Assist Alarm Sensor harness is open or shorted, Rear Parking Assist Alarm 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.
Code B138A Buick Description
What are the Possible Causes of the DTC B138A Buick?
- Faulty Rear Parking Assist Alarm Sensor
- Rear Parking Assist Alarm Sensor harness is open or shorted
- Rear Parking Assist Alarm Sensor circuit poor electrical connection
- Faulty Parking Assist Control Module
How to Fix the DTC B138A Buick?
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
DTC B138A 07: Control Module Voltage Reference Output Circuit High Voltage
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B138A Buick 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 B138A Buick Code
1. What are the common symptoms of OBDII code B138A in a Buick related to the Control Module Voltage Reference Output Circuit?
- Common symptoms include engine stalling, rough idling, poor performance, and issues with starting the vehicle.
2. What are the possible causes of OBDII code B138A in a Buick?
- The code B138A can be triggered by issues such as a faulty control module, damaged wiring or connectors, or a defective voltage reference circuit.
3. How can I diagnose the Control Module Voltage Reference Output Circuit related to code B138A in my Buick?
- To diagnose this issue, you may need to perform a thorough inspection of the wiring, connectors, and control module related to the voltage reference output circuit. Using a multimeter to check voltage levels can also be helpful.
4. How can I repair the Control Module Voltage Reference Output Circuit issue causing OBDII code B138A in my Buick?
- Repairing this issue may involve replacing damaged wiring or connectors, repairing the control module if faulty, or addressing any issues with the voltage reference circuit itself.
5. Can driving with OBDII code B138A present in my Buick cause further damage?
- Continuing to drive with code B138A present can potentially lead to further damage to the vehicle's engine or control systems. It is advisable to address the issue promptly.
6. Is it safe to clear the OBDII code B138A related to the Control Module Voltage Reference Output Circuit in my Buick without addressing the underlying issue?
- Clearing the code without addressing the underlying issue may temporarily eliminate warning lights, but the problem causing the code can persist and potentially lead to more severe issues in the future.
7. How can I prevent OBDII code B138A from reoccurring in my Buick after repairing the Control Module Voltage Reference Output Circuit issue?
- To prevent the code from reoccurring, ensure that all repairs are done correctly, use high-quality replacement parts, and perform regular maintenance checks to catch any potential issues early.
8. Can a DIY enthusiast with some automotive knowledge repair the Control Module Voltage Reference Output Circuit issue causing OBDII code B138A in a Buick?
- Depending on the level of expertise, a DIY enthusiast with some automotive knowledge may be able to address this issue. However, complex electrical problems may require professional assistance.
9. How much can I expect to pay for repairing the Control Module Voltage Reference Output Circuit issue causing OBDII code B138A in my Buick at a repair shop?
- The cost of repairing this issue can vary depending on the extent of the damage and the labor rates of the repair shop. It is advisable to obtain quotes from multiple shops for comparison.
10. Will fixing the Control Module Voltage Reference Output Circuit related to code B138A improve the overall performance and efficiency of my Buick?
- Yes, addressing this issue can lead to improved engine performance, smoother idling, better fuel efficiency, and overall better driving experience in your Buick.
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