Engine-Codes - Toyota - P1551 Toyota

P1551 Toyota Code - Battery Current Sensor Circuit Low Input

- Code Popularity: 14,041 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC P1551 Toyota?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Battery Current Sensor (Built into the Generator Control ECU Assembly)
  • Battery Current Sensor harness is open or shorted
  • Battery Current Sensor circuit poor electrical connection
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How to Fix the DTC P1551 Toyota?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1551 Toyota code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P1551 Toyota Code Mean?

The power generation voltage variable control enables fuel consumption to be decreased by reducing the engine load which is caused by the power generation of the generator. The battery current sensor built into the Generator Control Reassembly detects the amount of charge/discharge current. The Generator Control ECU assembly sends voltage generation instructions to the generator assembly based on this signal. The Diagnostic Trouble Code (DTC) will be set when the battery current sensor output value is abnormally low for 30 seconds or more with the ignition switch ON.

P1551 Toyota Code - Battery Current Sensor Circuit Low Input

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