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What is the solution for the Camry B1421 trouble code?

1 Answers

Casey

07/29/25 3:22pm

Solution for the Camry B1421 trouble code: Exclude wiring issues, check whether the sensor is faulty or has a "false alarm" possibility. After clearing the wiring or replacing the sensor, the fault can be eliminated, and the code can be cleared. Use a dedicated diagnostic tool (as mentioned earlier) to perform the clearing and resetting operation. Car maintenance precautions: 1. Automatic transmission failure: It may be related to the engine, electronic control system, and automatic transmission. Therefore, confirm that the fault is inside the automatic transmission before disassembling and repairing it. 2. Lifting or supporting the vehicle: If only the front or rear of the car needs to be lifted, wheel chocks must be used to secure the wheels. 3. Disassembling and inspecting electrical components: First, disconnect the negative terminal of the battery. Disconnecting the negative terminal may cause the audio system, anti-theft system, etc., to lock and may lead to the loss of certain system setting parameters. Therefore, relevant records must be made before powering off. 4. When replacing a fuse: The new fuse must have an equivalent current intensity. Do not use a fuse that exceeds or falls below the specified current value. Use a digital multimeter with an appropriate range to inspect electrical components to avoid damaging parts.

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