B2958 Code - Panel/Defrost Door Open Circuit Short/Failure
Quick Answer
Under normal operation, to rotate the mode door actuator clockwise, the Electric Manual Temperature Control (EMTC) module or Electronic Automatic Temperature Control (EATC) module supplies voltage to the Blend, Floor/Defrost and Panel mode door actuator motors through the door actuator feed B circuits, and supplies ground through the door actuator feed A circuits. Common causes include Faulty Panel/Defrost Door Actuator Motor, Panel/Defrost Door Actuator Motor harness is open or shorted, Panel/Defrost Door Actuator Motor 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
- B2958 indicates Panel/Defrost Door Open Circuit Short/Failure.
- Common causes
- Common causes include Faulty Panel/Defrost Door Actuator Motor, Panel/Defrost Door Actuator Motor harness is open or shorted, Panel/Defrost Door Actuator Motor 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 B2958 Description
The mode door actuator feedback resistors are supplied a ground from the EMTC module or EATC module by the mode door actuator return circuits and a 5-volt reference voltage on the mode door actuator reference circuits. The EMTC module or EATC module reads the voltage on the mode door actuator feedback circuits to determine the mode door actuator position by the position of the actuator feedback resistor wiper arm.
What are the Possible Causes of the DTC B2958?
- Faulty Panel/Defrost Door Actuator Motor
- Panel/Defrost Door Actuator Motor harness is open or shorted
- Panel/Defrost Door Actuator Motor circuit poor electrical connection
- Faulty Electric Manual Temperature Control (EMTC) Module or Electronic Automatic Temperature Control (EATC) Module
How to Fix the DTC B2958?
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 B2958 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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Information for Specific Makes
- B2958 Buick — Security System Sensor Data Circuit High
- B2958 Cadillac — Security System Sensor Data Circuit High
- B2958 Chevrolet — Security System Sensor Data Circuit High
- B2958 Ford — Panel/Defrost Door Open Circuit Short/Failure
- B2958 GMC — Security System Sensor Data Circuit High
- B2958 Lincoln — Panel/Defrost Door Open Circuit Short/Failure
- B2958 Mercury — Panel/Defrost Door Open Circuit Short/Failure
Frequently Asked Questions about B2958 Code
1. What are the common symptoms of OBDII code B2958?
- The common symptoms of code B2958 include issues with the heating and cooling system not working properly, incorrect air distribution, or the defrost mode not functioning.
2. What are the possible causes of OBDII code B2958?
- The code B2958 can be triggered by a faulty panel/defrost door actuator, damaged wiring, a blown fuse, or a defective control module.
3. How can I diagnose OBDII code B2958?
- To diagnose code B2958, you can use a scan tool to retrieve the code, inspect the panel/defrost door actuator, check the wiring for any damage, and test the control module for proper function.
4. What are some repair tips for resolving OBDII code B2958?
- Repair tips for code B2958 may include replacing the faulty panel/defrost door actuator, repairing damaged wiring, checking and replacing any blown fuses, and reprogramming or replacing the control module if necessary.
5. Can I drive my vehicle with OBDII code B2958?
- It is not recommended to drive your vehicle with unresolved OBDII code B2958, as it may lead to further damage to the heating and cooling system or affect the overall performance of the vehicle.
6. How much does it cost to repair OBDII code B2958?
- The cost of repairing OBDII code B2958 can vary depending on the underlying issue, the extent of the damage, and the labor rates of the repair shop. It is advisable to get a diagnosis and cost estimate from a professional technician.
7. Is OBDII code B2958 a serious issue?
- While OBDII code B2958 may not pose an immediate safety risk, it is still important to address the issue promptly to ensure the proper functioning of the heating and cooling system in your vehicle.
8. Can OBDII code B2958 cause damage to other vehicle components?
- If left unresolved, OBDII code B2958 can potentially cause damage to other components of the heating and cooling system, leading to more extensive repairs and increased costs in the long run.
9. How long does it take to repair OBDII code B2958?
- The repair time for OBDII code B2958 can vary depending on the specific issue and the availability of parts. In some cases, the repair may be completed within a few hours, while more complex issues may require additional time.
10. Will resetting the OBDII code B2958 resolve the issue?
- Resetting the OBDII code B2958 may temporarily clear the code, but it will not fix the underlying problem causing the issue. It is important to diagnose and repair the root cause of the code to ensure a proper fix.
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