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P1551 2011 Nissan Altima Sedan Code - Battery Current Sensor Circuit Low Input

Quick Answer

The P1551 diagnostic trouble code (DTC) for a 2011 Nissan Altima Sedan indicates a problem with the Battery Current Sensor Circuit Low Input. Common causes include Faulty Battery Current Sensor: The sensor itself may be malfunctioning, providing inaccurate readings to the PCM, Wiring Issues: Corrosion, damage, or loose connections in the wiring harness connected to the battery current sensor can cause a low input signal, Battery Problems: A weak or failing battery can also trigger the P1551 code, as it may not be providing the necessary voltage for proper sensor operation. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1551 2011 Nissan Altima Sedan indicates Battery Current Sensor Circuit Low Input.
Common causes
Common causes include Faulty Battery Current Sensor: The sensor itself may be malfunctioning, providing inaccurate readings to the PCM, Wiring Issues: Corrosion, damage, or loose connections in the wiring harness connected to the battery current sensor can cause a low input signal, Battery Problems: A weak or failing battery can also trigger the P1551 code, as it may not be providing the necessary voltage for proper sensor operation.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P1551 2011 Nissan Altima Sedan Description

The P1551 diagnostic trouble code (DTC) for a 2011 Nissan Altima Sedan indicates a problem with the Battery Current Sensor Circuit Low Input. This code is typically triggered when the powertrain control module (PCM) detects a lower than expected voltage signal from the battery current sensor. The battery current sensor is responsible for monitoring the electrical current flowing in and out of the vehicle's battery. This information is crucial for the PCM to accurately manage the charging system and ensure proper battery health.

OBDII Code P1551 2011 Nissan Altima Sedan - Battery Current Sensor Circuit Low Input
P1551 2011 Nissan Altima Sedan Code - Battery Current Sensor Circuit Low Input

Common Causes of P1551 2011 Nissan Altima Sedan

  1. Faulty Battery Current Sensor: The sensor itself may be malfunctioning, providing inaccurate readings to the PCM.
  2. Wiring Issues: Corrosion, damage, or loose connections in the wiring harness connected to the battery current sensor can cause a low input signal.
  3. Battery Problems: A weak or failing battery can also trigger the P1551 code, as it may not be providing the necessary voltage for proper sensor operation.
  4. PCM Malfunction: In rare cases, a malfunctioning PCM can incorrectly interpret the signals from the battery current sensor, leading to the code being triggered.
  5. Electrical System Faults: Other issues within the vehicle's electrical system, such as a faulty alternator or voltage regulator, can also contribute to the P1551 code.

Symptoms of P1551 2011 Nissan Altima Sedan

  1. Check Engine Light: The most common symptom associated with the P1551 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Poor Fuel Efficiency: Due to improper charging system regulation, the vehicle may experience reduced fuel efficiency.
  3. Battery Issues: The battery may not charge properly, leading to frequent battery drain or difficulty starting the vehicle.
  4. Electrical Malfunctions: Other electrical components in the vehicle may not function correctly, such as power windows, lights, or the radio.
  5. Engine Performance Issues: The vehicle may experience rough idling, stalling, or hesitation during acceleration due to improper electrical system regulation.

How to Fix P1551 2011 Nissan Altima Sedan

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific DTC and verify the low input signal from the battery current sensor.
  2. Inspect Wiring and Connections: Check the wiring harness connected to the battery current sensor for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the Battery: Ensure the battery is in good condition and providing the correct voltage. Replace if necessary.
  4. Replace Battery Current Sensor: If the sensor is found to be faulty, replace it with a new one following manufacturer guidelines.
  5. Clear DTC and Test Drive: Clear the DTC from the PCM memory, then test drive the vehicle to ensure the issue has been resolved and the code does not return.

Cost to Fix P1551 2011 Nissan Altima Sedan

The cost of repairing a P1551 code on a 2011 Nissan Altima Sedan can vary depending on the specific cause of the issue and the labor rates in your area. In general, the cost of parts for this repair, including a new battery current sensor, wiring harness, and potential battery replacement, can range from $100 to $300. Labor costs at an auto repair shop typically range from $80 to $150 per hour, with the total repair time estimated at around 1-2 hours. Therefore, the total repair cost for addressing a P1551 code on a 2011 Nissan Altima Sedan could range from $180 to $450. It's recommended to obtain a detailed quote from a local auto repair shop to get a more accurate estimate based on your specific circumstances.

What does this mean?

Tech Notes for P1551 2011 Nissan Altima Sedan

Make sure the battery cables are not corroded and are clean and tight.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1551 2011 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P1551 on a 2011 Nissan Altima Sedan?

- Common symptoms include illuminated check engine light, decreased fuel efficiency, and possible issues with starting the vehicle.

2. What does the OBDII code P1551 "Battery Current Sensor Circuit Low Input" mean for a 2011 Nissan Altima Sedan?

- This code indicates that the powertrain control module (PCM) has detected a low input signal from the battery current sensor circuit.

3. What are the possible causes of OBDII code P1551 on a 2011 Nissan Altima Sedan?

- Possible causes include a faulty battery current sensor, damaged wiring or connectors in the circuit, or a problem with the PCM itself.

4. How can I diagnose the issue related to OBDII code P1551 on my 2011 Nissan Altima Sedan?

- Diagnosing the problem may involve using a scan tool to retrieve the code, checking the battery current sensor and its connections, and inspecting the wiring for any damage.

5. Can I drive my 2011 Nissan Altima Sedan with OBDII code P1551 "Battery Current Sensor Circuit Low Input"?

- It is not recommended to drive the vehicle with this code present, as it can lead to further electrical issues and potential damage if left unresolved.

6. How can I reset the OBDII code P1551 on my 2011 Nissan Altima Sedan?

- You can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes, but it is important to address the underlying issue causing the code to prevent it from coming back.

7. Is it safe to ignore OBDII code P1551 on my 2011 Nissan Altima Sedan?

- Ignoring this code can lead to electrical problems and potential issues with the vehicle's performance, so it is best to diagnose and repair the underlying cause promptly.

8. Can a DIY enthusiast fix OBDII code P1551 on a 2011 Nissan Altima Sedan?

- Depending on the cause, a DIY enthusiast may be able to fix this code by checking and replacing the battery current sensor, as well as addressing any wiring issues if comfortable with automotive repairs.

9. How much does it typically cost to repair OBDII code P1551 on a 2011 Nissan Altima Sedan at a dealership or repair shop?

- Repair costs can vary depending on the exact cause of the issue, but expect to pay for diagnostic time, replacement parts (such as the battery current sensor), and labor fees, which can range from $100 to $500 or more.

10. Are there any preventative maintenance tips to avoid OBDII code P1551 on a 2011 Nissan Altima Sedan in the future?

- Regularly inspecting the battery current sensor, keeping the electrical system well-maintained, and promptly addressing any warning signs can help prevent the recurrence of this code.

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