B138A Chevrolet 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 Chevrolet 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 Chevrolet Description
What are the Possible Causes of the DTC B138A Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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 Chevrolet Code
1. What are the common symptoms of OBDII code B138A in a Chevrolet related to the Control Module Voltage Reference Output Circuit?
The common symptoms include engine stalling, rough idling, poor acceleration, and issues with the vehicle's electrical systems.
2. What are the potential causes of OBDII code B138A in a Chevrolet?
Possible causes of this code include a faulty control module, damaged wiring or connectors in the voltage reference circuit, or a weak or failing battery.
3. How can I diagnose the Control Module Voltage Reference Output Circuit issue in my Chevrolet?
To diagnose the issue, you can use a multimeter to test the voltage output at various points in the circuit, visually inspect wiring and connectors for damage, and check the battery voltage.
4. What are some tips for repairing OBDII code B138A in a Chevrolet?
Repair tips include checking and repairing any damaged wiring or connectors, replacing the control module if necessary, and ensuring the battery is in good condition.
5. Can I drive my Chevrolet with OBDII code B138A present?
It is not recommended to drive the vehicle with this code present, as it can lead to further damage and safety issues. It's best to address the problem promptly.
6. Are there any safety concerns associated with OBDII code B138A in a Chevrolet?
Yes, there can be safety concerns, especially if the issue affects critical systems like engine performance or electrical components. It's important to address the problem to ensure safe operation of the vehicle.
7. How much does it typically cost to repair OBDII code B138A in a Chevrolet?
The cost of repair can vary depending on the exact cause of the issue and labor rates in your area. It's best to consult with a mechanic for an accurate estimate.
8. Can OBDII code B138A in a Chevrolet be triggered by a loose battery connection?
Yes, a loose or corroded battery connection can potentially contribute to triggering this code due to voltage irregularities in the system.
9. Will disconnecting the battery reset OBDII code B138A in a Chevrolet?
Disconnecting the battery may temporarily clear the code, but it is not a recommended fix as the underlying issue causing the code will still need to be addressed.
10. How soon should I address OBDII code B138A in my Chevrolet once it appears?
It is advisable to address the code as soon as possible to prevent further damage to the vehicle and ensure safe and reliable operation.
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