AutoCodes – Generic – P1550

P1550 Code - Battery Current Sensor Circuit Range/Performance

Quick Answer

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. Common causes include Faulty Battery Current Sensor, Battery Current Sensor harness is open or shorted, Battery Current Sensor circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P1550 indicates Battery Current Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty Battery Current Sensor, Battery Current Sensor harness is open or shorted, Battery Current Sensor circuit poor electrical connection.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code Popularity 53,554
How popular is this code, among other codes? Medium
Table of contents Created and updated by William Orellana on Aug 29, 2019
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Code P1550 Description

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 is installed to the battery cable at the negative terminal. The sensor measures the charging/discharging current of the battery. Based on the sensor signal, Engine Control Module (ECM) judges whether or not the power generation voltage variable control is performed. When performing the power generation voltage variable control, ECM calculates the target power generation voltage based on the sensor signal. And ECM sends the calculated value as the power generation command value to IPDM E/R.
OBDII Code P1550 - Battery Current Sensor Circuit Range/Performance - AutoCodes.com
P1550 Code - Battery Current Sensor Circuit Range/Performance

What are the Possible Causes of the DTC P1550?

  • Faulty Battery Current Sensor
  • Battery Current Sensor harness is open or shorted
  • Battery Current Sensor circuit poor electrical connection

How to Fix the DTC P1550?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1550 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1550 code?

Need more information on how to fix the P1550 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1550 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 P1550 Code

1. What are the common symptoms of OBDII code P1550 (Battery Current Sensor Circuit Range/Performance)?

The common symptoms of P1550 may include loss of power, poor fuel efficiency, difficulty starting the vehicle, and in some cases, the vehicle may enter into a limp mode.

2. What are the possible causes of OBDII code P1550?

The potential causes of P1550 include a faulty battery current sensor, damaged wiring or connectors in the sensor circuit, a weak battery, or issues with the vehicle's powertrain control module (PCM).

3. How can I diagnose the Battery Current Sensor Circuit for OBDII code P1550?

To diagnose the battery current sensor circuit, you can start by checking the sensor's wiring and connectors for any visible damage, testing the sensor's output voltage, and verifying the battery's condition and voltage.

4. Can a weak battery trigger OBDII code P1550?

Yes, a weak battery can potentially trigger code P1550 as it may affect the accuracy of the battery current sensor readings, leading to a performance range issue.

5. What are some repair tips for addressing OBDII code P1550?

Some repair tips for P1550 include checking and replacing the battery current sensor if necessary, repairing any damaged wiring or connectors, ensuring the battery is in good condition, and resetting the fault code after repairs.

6. Is it safe to continue driving with OBDII code P1550 present?

It is not recommended to continue driving with OBDII code P1550 present, as it can lead to further issues with the vehicle's performance and potentially cause damage to other components.

7. How can I reset OBDII code P1550 after addressing the underlying issue?

You can reset OBDII code P1550 using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the PCM's memory.

8. Can a DIY enthusiast address OBDII code P1550, or is professional help recommended?

While some DIY enthusiasts may be able to address P1550 by checking the sensor circuit and making basic repairs, it is often recommended to seek professional help for accurate diagnosis and repair.

9. Will OBDII code P1550 cause my vehicle to fail an emissions test?

Yes, OBDII code P1550 can cause your vehicle to fail an emissions test, as it indicates a malfunction in the battery current sensor circuit, which is related to the vehicle's emissions control system.

10. How long does it typically take to repair OBDII code P1550?

The repair time for OBDII code P1550 can vary depending on the underlying cause and the extent of the repairs needed. It can range from a quick sensor replacement to more extensive wiring repairs, potentially taking a few hours to complete.

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