For the specific case of , Honda technical service bulletins (TSBs) and dealership diagnostic software identify this code as:
Do not buy a used sensor. Each sensor is factory-calibrated to the vehicle’s particular BCM. Used sensors often have mismatched internal memory. Fix #5: PCM Software Update (Cost: $100 - $200 dealer diagnostic fee) If everything else tests perfect, a software glitch is the culprit. Honda dealers can flash the latest calibration (search for TSB 19-045 for the full applicability list). After the update, the PCM accepts a wider range of sensor data without throwing a code. Can I Drive with the B23A0-92 Code? Short answer: Yes, but with caveats. honda b23a0-92
The vehicle remains drivable. The check engine light being on may cause you to fail an emissions inspection in some states (because the monitor for the charging system is "not ready"). More importantly, the car’s battery will not be managed optimally. Over time, this can shorten battery life from 4-5 years to maybe 1-2 years. You may also experience a dead battery if the vehicle sits for more than a few days. For the specific case of , Honda technical
If the code is accompanied by a or warning that says “Stop driving—charging system failure,” do not drive. That indicates a failed alternator, not just the sensor. Otherwise, schedule repair within a few weeks. Frequently Asked Questions (FAQ) Q: Will disconnecting the battery clear the B23A0-92 code? Yes, temporarily. But if the underlying problem (bad sensor, wrong battery, etc.) persists, the code will return after 3-5 drive cycles (approximately 50-100 miles). Q: Is B23A0-92 covered under Honda warranty? If your vehicle is under the 3-year/36,000-mile basic warranty or 5-year/60,000-mile powertrain (note: battery sensors are often considered emissions/electrical, not powertrain), then yes. Additionally, Honda has a voluntary service bulletin for 2017-2019 Accords where they will reimburse diagnostics for this code. Call your dealer with your VIN. Q: Can a bad alternator cause B23A0-92? Rarely, but yes. An alternator that produces wildly fluctuating voltage (e.g., 11V to 15V in seconds) can confuse the current sensor’s rationality checks. But in that case, you’d typically also see P0562 or P0563 codes. Q: Why does this code keep coming back after I changed the battery? 99% probability you did not perform a BMS reset. The car still thinks the old, weak battery is installed. When the new battery’s voltage stays higher than expected, the PCM flags it as “sensor performance error.” Final Thoughts: Don’t Ignore the B23A0-92 The Honda B23A0-92 code is rarely an emergency, but it is a sign that your vehicle’s intelligent battery management network is unhappy. Ignoring it leads to premature battery failure, reduced fuel economy (because idle-stop won’t engage), and potential no-start situations in cold weather. Fix #5: PCM Software Update (Cost: $100 -
The code is a specific manufacturer-specific diagnostic trouble code (DTC) used by Honda. Unlike generic OBD-II codes (P0300 for misfire, etc.), this code lives in the network of your vehicle’s onboard computers, often relating to advanced driver-assistance systems (ADAS), battery health, or complex electrical circuits.
Scan all modules. B23A0-92 often appears with P0562 (System Voltage Low), P154A (Battery Current Sensor Circuit Range), or U0168 (Lost Comms with BMS). Those companions help narrow the cause.
is a proper battery replacement with BMS reset—not just clearing the code. If you’ve already done that and the code persists, replace the battery current sensor or get the PCM software update from a Honda dealership.