P0558 Subaru Code - Alternator Circuit Low Charge Rate
Quick Answer
The Engine Control Module (ECM) monitors the Alternator charge. Common causes include Faulty Alternator, Alternator harness is open or shorted, Alternator 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
- P0558 Subaru indicates Alternator Circuit Low Charge Rate.
- Common causes
- Common causes include Faulty Alternator, Alternator harness is open or shorted, Alternator 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.
Code P0558 Subaru Description
What are the Possible Causes of the DTC P0558 Subaru?
- Faulty Alternator
- Alternator harness is open or shorted
- Alternator circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0558 Subaru?
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 P0558 Subaru 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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Frequently Asked Questions about P0558 Subaru Code
1. What are common symptoms of OBDII code P0558 in a Subaru related to the alternator circuit low charge rate?
The common symptoms include dimming lights, slow power window operation, battery warning light on the dashboard, and difficulty starting the vehicle.
2. What are the possible causes of OBDII code P0558 in a Subaru indicating a low charge rate from the alternator circuit?
Potential causes include a faulty alternator, damaged alternator wiring, poor electrical connections, a worn-out drive belt, or a failing voltage regulator.
3. How can I diagnose OBDII code P0558 in my Subaru to pinpoint the issue with the alternator circuit?
You can use a multimeter to test the alternator output voltage, inspect the alternator and its wiring for physical damage, check the drive belt for wear, and ensure all electrical connections are secure.
4. Can a failing battery trigger OBDII code P0558 in a Subaru even if the alternator is functioning properly?
Yes, a weak or failing battery can cause the alternator to work harder, potentially triggering a low charge rate fault code like P0558. It is recommended to test the battery health along with the alternator.
5. How serious is OBDII code P0558 in a Subaru, indicating a low charge rate from the alternator circuit?
Ignoring this code can lead to a dead battery and eventually cause the vehicle to stall. It is crucial to address the issue promptly to avoid getting stranded due to a lack of electrical power.
6. Can I continue driving my Subaru with OBDII code P0558 present, indicating a low charge rate from the alternator circuit?
It is not recommended to drive the vehicle with this code, as it can lead to a drained battery and potential stalling of the vehicle. It is best to address the issue as soon as possible.
7. Are there any simple repair tips to try before seeking professional help for OBDII code P0558 in a Subaru related to the alternator circuit?
You can start by checking the alternator belt tension, cleaning and tightening electrical connections, and inspecting for any visible damage to the alternator or its wiring before seeking professional help.
8. How much does it typically cost to repair OBDII code P0558 in a Subaru caused by a low charge rate from the alternator circuit?
The cost of repair can vary depending on the exact cause of the issue. It can range from a simple belt replacement to a complete alternator replacement, with costs typically falling between $200 to $800 or more.
9. Is it possible to reset OBDII code P0558 in a Subaru indicating a low charge rate from the alternator circuit without fixing the underlying issue?
Resetting the code without addressing the root cause will only temporarily clear the warning light. The issue will persist, and the code will likely reappear once the problem triggers it again.
10. How long does it take to repair OBDII code P0558 in a Subaru related to the alternator circuit low charge rate?
The repair time can vary depending on the exact cause of the issue and the extent of the repair needed. It can take anywhere from 1 to 4 hours for a professional mechanic to diagnose and fix the problem.
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