OBD code B1591 indicates an issue with the Autolamp Delay system in the Body Control Module (BCM).
Symptoms include the Engine Light being ON.
This code is caused by faults in the Autolamp Delay system or BCM.
While not critical, it should be addressed.
To fix, inspect wiring, connectors, and components for damage or poor connections.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the b1591 OBD Code
The vehicle displays an issue related to the B1591 fault code.
- Symptoms: Service Engine Soon Warning Light illuminated.
- Possible loss of communication with the smart junction box module.
- Difficulty starting the vehicle.
- Horn may sound intermittently without driver input.
Causes of the b1591 OBD Code
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B1591 code typically indicates a fault in the mirror switch memory position circuit.
- B1591 can be caused by a faulty Autolamp Delay.
- An open or shorted Autolamp Delay harness.
- A poor electrical connection in the Autolamp Delay circuit.
- A faulty Body Control Module (BCM).
Fixing Error Code b1591 Step By Step
Address the issue by inspecting the wiring harness for faults or damage.
- To fix OBDII code B1591, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, check the operation of the keyless entry keypad and replace it if necessary.
- Perform a reset on the keyless entry module and reprogram it if the issue persists.
- Finally, clear the fault codes and test the system to verify that the repair was successful.
Cost Of Fixing b1591 Fault Code
The repair for fault code B1591 typically involves diagnosing and fixing an issue with the keyless entry system.
The cost to diagnose and fix OBD code B1591 depends on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour.
The total cost will vary based on shop rates, complexity of the issue, and any additional parts or services needed.
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Details of the b1591 OBD Code
B1591 code indicates a problem with the immobilizer key.
OBD code B1591 means a problem with the keyin switch circuit.
This code is triggered by the Body Control Module (BCM) when it detects an issue with the keyin switch circuit.
The keyin switch circuit is part of the vehicle’s antitheft system and is responsible for detecting whether the key is inserted in the ignition switch.
When this circuit malfunctions, it can prevent the vehicle from starting or cause other related issues with the antitheft system.
Mechanic’s Tech Notes
Code B1591 indicates a problem with the smart junction box (SJB) internal circuitry.
OBDII code B1591 indicates a problem with the transmission control module (TCM) power circuit.
To diagnose, use a multimeter to check TCM power and ground connections for proper voltage and continuity.
Utilize a scan tool to confirm TCM communication over the Controller Area Network (CAN) bus.
Visually inspect wiring harnesses and connectors for any damage, and ensure connector pins are not broken, bent, or corroded.
If necessary, consider reprogramming or reflashing the TCM.
This comprehensive approach will help pinpoint the issue and guide you towards an effective repair.
FAQ
OBD code B1591 indicates an issue with the Autolamp Delay system. Check wiring harness, connectors, and BCM for faults. Inspect for damage or corrosion.
Common symptoms of OBD code B1591 include Engine Light ON, caused by issues with Autolamp Delay system or Body Control Module. Fix involves inspecting wiring and connectors.
Diagnose OBD code B1591 by checking Autolamp Delay system for faults. Inspect wiring, connectors, and BCM for issues. Repair as needed.
Wrap Up
If your vehicle is displaying OBD code b1591, you may experience issues with the airbag system, such as the airbag warning light staying on or the airbags not deploying in a collision.
This code typically indicates a problem with the airbag diagnostic monitor.
To address OBD code b1591, start by checking the wiring harness and connectors related to the airbag diagnostic monitor.
Look for any damaged wiring, loose connections, or corrosion.
If no issues are found, consider replacing the airbag diagnostic monitor to resolve the problem.
