Toyota Error Code C1345 – Linear Solenoid Valve Offset Learning Undone

🔍 What Does Toyota Error Code C1345 Mean?

C1345 – Linear Solenoid Valve Offset Learning Undone indicates that the brake system’s ECU (usually part of the ABS or VSC actuator assembly) has detected that the offset learning procedure for the linear solenoid valve has not been performed after a critical component replacement or system reset. This “learning” is essential for proper brake fluid pressure control within the VSC/ABS system.

📍 When and Why It Appears

• The brake actuator or VSC ECU has been replaced or reset
• The linear solenoid offset learning procedure was skipped
• Battery was disconnected and the memory was cleared without relearning
• Vehicle stability control initialization was interrupted or failed

⚠️ Common Symptoms of C1345

• ABS, VSC, or TRAC warning lights on the dashboard
• VSC/TRAC system disabled until procedure is completed
• Braking may feel normal but advanced safety features are inactive

🔎 Common Causes

• New or reprogrammed brake actuator installed
• Battery disconnected or low during learning process
• Learning procedure not completed using scan tool
• Interruption during Techstream initialization

🧰 How to Diagnose Toyota Code C1345

1. Connect a Toyota Techstream or OBD-II scanner with ABS/VSC capability
2. Navigate to ABS/VSC → Utility → Linear Valve Offset Learning
3. Check if the learning has failed or was skipped
4. Ensure no other DTCs like C1368 or C1451 are present that may block learning
5. Verify battery voltage is above 12.5V before starting the procedure

🔧 How to Fix Toyota Error Code C1345

1. Perform the Linear Solenoid Valve Offset Learning procedure using Toyota Techstream or equivalent scan tool
2. Ensure all other brake/VSC codes are cleared beforehand
3. If learning fails, inspect ABS wiring harness and voltage levels
4. After successful completion, clear the code and test drive to confirm system functionality

💰 Estimated Repair Costs

• Techstream Diagnostic or Reset: ₱800 – ₱2,000
• Brake Actuator Replacement (if needed): ₱12,000 – ₱25,000
• Labor for learning procedure or initialization: ₱1,000 – ₱1,500

🧠 Expert Tips

• Always perform offset learning after replacing ABS actuator or ECU
• Use a reliable scan tool—generic tools may not support this utility
• If ABS/VSC light won’t turn off, check for underlying codes blocking the procedure

❓ FAQ – Toyota C1345

Can I drive with C1345?

Yes, but ABS and VSC features may be disabled. Drive with caution, especially on wet or slippery roads.

Do I need special tools to fix this?

Yes. The offset learning must be performed using Toyota Techstream or another advanced scan tool that supports ABS utilities.

Will clearing the code fix the issue?

No. The learning procedure must be completed to remove the code permanently.

Why did this code appear after battery replacement?

Because the ECU may have lost memory of its previous solenoid calibrations. It must re-learn them through the procedure.

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