Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P1586 (23): Battery Current Sensor Signal Malfunction
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
- If the DTC cannot be cleared, do the troubleshooting for DTC U1204 (55).
- Turn the ignition switch to ON (II).
- Clear the DTC with the HDS (see DTC CLEAR ).
- Check the SOC in the DATA LIST with the HDS.
Is there 25% or more?
YES -go to step 4.
NO -Start the engine, and hold it between 3,500 and 4,000 rpm without load (in P or N) until the SOC increase to 25%. Then go to step 5.
- Start the engine.
- Check under these conditions:
- Blower fan at maximum speed
- Rear window defogger on
- Headlights on high beam
- Let the engine idle for 1 minute.
- Monitor the OBD STATUS for DTC P0A3F (89), P0A5E (24), P0A5F (25), P0A61 (26), P0A62 (27), P0A64 (28), P0A65 (29), P0A78 (32), P0AC0 (65), P0AC1 (115), P0AC2 (114), POB0F (113), P0B10 (117), P0B11 (116), P0BE6 (86), P0BEA (87), P0BEE (88), P0BFD (30), P1440 (57), P15A5 (85), and P15AA (93) in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -go to step 8.
NO -
- If the screen indicates FAILED: Go to the indicated DTC's troubleshooting.
- If the screen indicates NOT COMPLETED: Keep the ignition switch ON (II) until a result comes on.
- Monitor the OBD STATUS for DTC P1586 (23) in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES -Check for poor connections or loose terminals at the battery current sensor and the MCM., If the connections and the terminals are OK, replace the battery module (see BATTERY MODULE REMOVAL/INSTALLATION ), then go to step 9.
NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the battery current sensor and the MCM. If the screen indicates NOT COMPLETED, go to step 3.
- Turn the ignition switch to ON (II).
- Clear the DTC with the HDS (see DTC CLEAR ).
- Check the SOC in the DATA LIST with the HDS.
Is there 25% or more?
YES -Start the engine, let it idle 2 seconds, then go to step 12.
NO -Start the engine, and hold it between 3,500 and 4,000 rpm without load (in P or N) until the SOC increases to 25%. Let it idle 2 seconds, then go to step 12.
- Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1586 (23) indicated?
YES -Check for poor connections or loose terminals at the battery current sensor and the MCM, then go to step 1.
NO -go to step 13.
- Monitor the OBD STATUS for DTC P1586 (30) in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 12, go to the indicated DTC's troubleshooting.
NO -If the screen indicates FAILED, check for poor connections or loose terminals at the battery current sensor and the MCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 11.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.