B2948 GMC Code - Security System Sensor Power Circuit High
Quick Answer
The Passlock™ system is provided in order to prevent vehicle theft if the ignition lock cylinder is forced to rotate or the ignition switch is operated while separated from the ignition lock cylinder case. Common causes include Faulty Security System Sensor, Security System Sensor harness is open or shorted, Security System 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
- B2948 GMC indicates Security System Sensor Power Circuit High.
- Common causes
- Common causes include Faulty Security System Sensor, Security System Sensor harness is open or shorted, Security System 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 B2948 GMC Description
When the correct key is used to start the vehicle, a magnet on the lock cylinder passes close to the Passlock™ sensor within the ignition lock cylinder case. The magnet activates the security hall effect sensor in the Passlock™ sensor which completes a circuit from the security sensor signal circuit through a resistor to the security sensor low reference circuit. The resistance value will vary from vehicle to vehicle. The BCM will measure the voltage on the security sensor signal circuit and compare this voltage to a previously learned voltage. If the voltage measured is within the valid range, the BCM will send a class 2 message to the Powertrain Control Module (PCM) to enable vehicle starting. If the voltage measured is not within the valid range, a class 2 message will be sent to the PCM to disable starting of the vehicle.
What are the Possible Causes of the DTC B2948 GMC?
- Faulty Security System Sensor
- Security System Sensor harness is open or shorted
- Security System Sensor circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B2948 GMC?
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 B2948 GMC 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 B2948 GMC Code
1. What are the common symptoms of OBDII code B2948 GMC (Security System Sensor Power Circuit High)?
- Common symptoms include the security system light staying illuminated, difficulty starting the vehicle, and potential issues with the vehicle's security features.
2. What are the possible causes of OBDII code B2948 GMC?
- The code B2948 GMC can be caused by a faulty security system sensor, a malfunctioning security system module, wiring issues, or a power supply problem to the sensor.
3. How can I diagnose the root cause of OBDII code B2948 GMC?
- To diagnose the cause of code B2948 GMC, it is recommended to use a professional OBDII scanner to read the trouble codes and perform a thorough inspection of the security system components.
4. Is it safe to drive with OBDII code B2948 GMC active?
- It is generally not recommended to drive with the B2948 code active, as it may impact the proper functioning of the vehicle's security system and potentially lead to starting issues.
5. Can I reset OBDII code B2948 GMC without fixing the underlying issue?
- While you can clear the code with an OBDII scanner, it is important to address the root cause of the problem to prevent the code from reappearing.
6. How can I repair OBDII code B2948 GMC?
- Repairing code B2948 GMC involves inspecting and repairing or replacing the security system sensor, checking and repairing wiring connections, and ensuring the power supply to the sensor is functioning correctly.
7. Are there any DIY tips for fixing OBDII code B2948 GMC?
- DIY tips for fixing code B2948 GMC include checking the sensor connections for corrosion, ensuring the sensor is securely mounted, and inspecting the wiring for any visible damage.
8. Can a low battery trigger OBDII code B2948 GMC?
- A low battery can potentially trigger code B2948 GMC, as it may affect the power supply to the security system sensor, leading to a high power circuit reading.
9. How long does it take to repair OBDII code B2948 GMC?
- The repair time for code B2948 GMC can vary depending on the exact cause of the issue, but it typically takes a few hours to diagnose and fix the problem.
10. Will OBDII code B2948 GMC cause my vehicle to fail an emissions test?
- OBDII code B2948 GMC is not directly related to emissions, so it should not cause your vehicle to fail an emissions test. However, it is still important to address the issue for proper vehicle operation.
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