B2957 Chevrolet Code - Security System Sensor Data Circuit Low
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
- B2957 Chevrolet indicates Security System Sensor Data Circuit Low.
- 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 B2957 Chevrolet 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 B2957 Chevrolet?
- 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 B2957 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B2957 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.
Need more information about the B2957 Chevrolet code?
Need more information on how to fix the B2957 Chevrolet code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B2957 Chevrolet code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B2957 Chevrolet Code
1. What are the common symptoms of OBDII code B2957 Chevrolet (Security System Sensor Data Circuit Low)?
- The common symptoms include issues with the vehicle's security system, such as difficulty starting the car, sporadic stalling, or the security light staying illuminated on the dashboard.
2. What can cause the OBDII code B2957 Chevrolet to trigger?
- This code can be triggered by a fault in the security system sensor data circuit, a malfunctioning security system sensor, wiring issues, or a problem with the security system control module.
3. How can I diagnose the cause of OBDII code B2957 Chevrolet?
- Diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes, checking the security system sensor data circuit for continuity and proper voltage, and inspecting the security system components for any visible damage.
4. What are some repair tips for fixing OBDII code B2957 Chevrolet?
- Repair tips may include checking and repairing any damaged wiring or connections in the security system sensor data circuit, replacing a faulty security system sensor, or reprogramming the security system control module if needed.
5. Can I drive my vehicle with OBDII code B2957 Chevrolet active?
- It is generally not recommended to drive the vehicle with this code active, as it may affect the proper functioning of the security system and potentially lead to further issues with starting or operating the vehicle.
6. How much does it typically cost to repair OBDII code B2957 Chevrolet?
- The cost of repairing this code can vary depending on the specific cause of the issue, but it may involve a few hundred dollars for parts and labor if professional assistance is needed.
7. Are there any DIY solutions for OBDII code B2957 Chevrolet?
- DIY solutions may include checking and repairing simple wiring issues, inspecting and cleaning connections, or replacing a faulty security system sensor if you have the necessary tools and skills.
8. Will resetting the OBDII code B2957 Chevrolet make it go away permanently?
- Resetting the code may temporarily clear it, but if the underlying issue causing the code is not addressed, it is likely to reappear once the problem is detected again during vehicle operation.
9. How long does it take to repair OBDII code B2957 Chevrolet?
- The repair time can vary depending on the complexity of the issue and the availability of parts, but it may take anywhere from a few hours to a day to diagnose and fix the problem.
10. Is it necessary to visit a dealership for OBDII code B2957 Chevrolet repair?
- While visiting a dealership or a qualified mechanic is recommended for accurate diagnosis and repair of this code, DIY enthusiasts with automotive repair experience may be able to address simpler causes of the issue themselves.
Discuss the causes and fixes for B2957 Chevrolet OBDII Code
Code B2957 Chevrolet comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
