AutoCodes – Scion – P1550 Scion

P1550 Scion 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 (Built into the Generator Control ECU Assembly), Battery Current Sensor harness is open or shorted, Battery Current Sensor circuit poor electrical connection. 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: P1550 Scion indicates Battery Current Sensor Circuit Range/Performance.
Common causes: Common causes include 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.
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.

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Code Popularity 2,758

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 06, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1550 Scion 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 built into the Generator Control ECU assembly 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 difference between the maximum and minimum current values of the battery current sensor is less than 1 A for 10 seconds or more with the ignition switch ON.

OBDII Code P1550 Scion - Battery Current Sensor Circuit Range/Performance - AutoCodes.com — P1550 Scion Code - Battery Current Sensor Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P1550 Scion?

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

How to Fix the DTC P1550 Scion?

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 Scion 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.

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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 P1550 Scion Code

What does the OBDII code P1550 mean in a Scion?

Code P1550 indicates an issue with the Battery Current Sensor Circuit, specifically a range or performance problem that affects the vehicle's ability to monitor battery current accurately.

What are the common symptoms of code P1550 in a Scion?

Symptoms may include an illuminated check engine light, inconsistent battery charging, difficulty starting the vehicle, or erratic electrical system behavior.

What causes the P1550 code in a Scion?

Common causes include a faulty battery current sensor, damaged wiring or connectors in the sensor circuit, corrosion at electrical connections, or issues with the vehicle's charging system.

Can a weak or failing battery trigger the P1550 code?

Yes, a weak or failing battery can cause the sensor to detect abnormal readings, potentially triggering the P1550 code.

How can I diagnose the P1550 code in a Scion?

Start by inspecting the battery current sensor and its wiring for damage or corrosion. Use a digital multimeter to test for continuity and voltage within the circuit, and check the battery for proper operation.

Is it safe to drive with the P1550 code in a Scion?

Driving with this code is not recommended, as it may lead to unreliable battery charging or electrical system issues that could result in a breakdown.

How do you fix the P1550 code on a Scion?

Repairs typically include replacing the faulty battery current sensor, repairing damaged wires or connectors in the circuit, cleaning corroded terminals, or addressing any battery or alternator issues.

Can clearing the P1550 code solve the problem permanently?

Clearing the code may temporarily remove the check engine light, but unless the underlying issue is repaired, the code is likely to return.

What tools are needed to troubleshoot the P1550 code in a Scion?

Youâ€™ll need an OBDII scanner, a digital multimeter, and possibly basic hand tools for inspecting and repairing wiring or replacing the sensor.

Does the P1550 code affect fuel efficiency or engine performance?

While it primarily affects the electrical system, unresolved issues with battery charging may indirectly impact engine performance or fuel efficiency over time.