P0758 Subaru Code - Shift Solenoid 'B' Electrical
Quick Answer
Shift solenoid valve 'B' is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shift solenoid 'B' valve. 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
- P0758 Subaru indicates Shift Solenoid 'B' Electrical.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shift solenoid 'B' valve.
- 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 P0758 Subaru Description
What are the Possible Causes of the DTC P0758 Subaru?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid 'B' valve
- Shift solenoid 'B' valve harness or connectors
- Shift solenoid 'B' valve circuit is open or shorted
How to Fix the DTC P0758 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 P0758 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 P0758 Subaru Code
1. What does the OBDII code P0758 mean on a Subaru?
P0758 indicates an electrical issue with the Shift Solenoid 'B' circuit, responsible for controlling gear shifts in the automatic transmission.
2. What are the common symptoms of code P0758 in a Subaru?
Symptoms may include harsh or delayed shifting, being stuck in one gear, transmission slipping, decreased fuel efficiency, and the check engine light being illuminated.
3. What causes the P0758 code to appear in a Subaru?
Common causes include a faulty shift solenoid 'B,' damaged wiring or connectors in the solenoid circuit, a malfunctioning transmission control module (TCM), or low transmission fluid.
4. Can low transmission fluid cause the P0758 code in a Subaru?
Yes, low or contaminated transmission fluid can lead to improper solenoid operation and trigger the P0758 code.
5. How can I diagnose the P0758 code on my Subaru?
Start by inspecting the transmission fluid level and condition, checking the wiring and connectors for damage, and testing the shift solenoid 'B' with a multimeter to ensure proper function.
6. How do I fix the P0758 code on a Subaru?
Repairs may include replacing the shift solenoid 'B,' repairing or replacing damaged wiring or connectors, flushing and refilling the transmission fluid, or addressing issues with the TCM.
7. Is it safe to drive a Subaru with the P0758 code?
Driving with this code is not recommended, as it can cause further damage to the transmission and lead to unsafe driving conditions due to improper gear operation.
8. How much does it cost to fix the P0758 code on a Subaru?
Repair costs can vary but typically range from $200 to $500 for solenoid replacement, with additional costs for wiring repairs or TCM replacement if needed.
9. Can a failing battery trigger the P0758 code in a Subaru?
A weak or failing battery can cause voltage issues that may affect the solenoid circuit, but this is less common compared to other causes.
10. Will clearing the code fix the P0758 issue on a Subaru?
Clearing the code without addressing the root cause will not resolve the issue, and the code is likely to return. Proper diagnosis and repair are necessary.
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