Quick Answer
P0A35 means: DTC P0A35 indicates a malfunction in the hybrid inverter cooling system.
Can I drive with P0A35? Immediate attention is recommended to prevent severe damage.
Common Questions
What does P0A35 mean and how does it affect my car?
DTC P0A35 indicates issues with your vehicle's inverter cooling system, primarily affecting hybrid models like the Toyota Prius. If left unresolved, it can lead to overheating, affecting performance and fuel efficiency.
What are the most common causes of P0A35 and how much does it cost to fix?
The most common causes include a failed inverter cooling pump (60% chance) and coolant leaks (25% chance). Repair costs can range from $150 to $600, depending on the issue.
Can I drive my car with P0A35 or should I stop immediately?
It is advised to stop driving your vehicle if the P0A35 code appears. Continuing to drive can cause severe damage to the hybrid system, leading to expensive repairs.
How can I diagnose P0A35 myself using GeekOBD APP?
Using the GeekOBD APP, perform an OBD2 scan to retrieve fault codes. Pay attention to freeze frame data for context, and follow up with visual checks of the cooling system.
What vehicles are most commonly affected by P0A35?
This code is primarily seen in 2013-2019 Toyota Prius models, but it can also affect other hybrid vehicles with similar inverter systems.
How can I prevent P0A35 from happening again?
Regularly check your coolant levels, ensure the cooling fans are functioning, and schedule periodic maintenance to keep the cooling system clean and efficient.
What is P0A35?
The diagnostic trouble code (DTC) P0A35 indicates a malfunction related to the vehicle's hybrid system, specifically concerning the inverter cooling system. This code is prevalent in hybrid vehicles, particularly the Toyota Prius models manufactured between 2013 and 2019. The inverter is critical as it converts direct current (DC) from the battery into alternating current (AC) to power the electric motor. If the inverter cooling system is not functioning correctly, it can lead to overheating, which may cause the inverter to fail. In practical terms, this can result in reduced fuel efficiency, loss of power, and potential damage to the hybrid battery system. Ignoring this code could lead to more severe problems, including costly repairs or complete hybrid system failure. Therefore, it’s crucial to address any P0A35 code promptly by checking the inverter coolant levels, inspecting the cooling fans, and ensuring there are no blockages. Vehicle owners should also be aware that driving with this code can limit the vehicle's performance and safety, making timely diagnostics and repairs essential.
System: P - Powertrain (Engine, Transmission, Emissions)
Symptoms
Common symptoms when P0A35 is present:
- Check engine light stays on constantly, indicating an issue with the hybrid system.
- Engine hesitates during acceleration, leading to inconsistent power delivery and a sluggish driving experience.
- Fuel economy decreased by 10-15%, which can significantly impact your overall driving costs.
- Unusual noises from the inverter cooling fan, such as grinding or rattling sounds, may indicate mechanical issues.
- Overheating warning light may illuminate, suggesting that the inverter is not cooling properly.
Possible Causes
Most common causes of P0A35 (ordered by frequency):
- {'cause': 'Failed inverter cooling pump or fan (60%)', 'details': 'The most common cause of P0A35 is a malfunctioning inverter cooling pump or fan, which can lead to inadequate cooling of the inverter, causing it to overheat.'}
- {'cause': 'Coolant leaks or low coolant levels (25%)', 'details': 'If there is a leak in the coolant system or if the coolant levels are low, the cooling system cannot function effectively, leading to overheating.'}
- {'cause': 'Blocked or dirty radiator fins (10%)', 'details': 'Debris or dirt buildup on the radiator can restrict airflow, preventing the cooling system from operating efficiently.'}
- {'cause': 'Electrical issues in the inverter circuit (4%)', 'details': "Damaged wiring or poor connections in the inverter's electrical system can lead to cooling system malfunctions."}
- {'cause': 'Faulty temperature sensor (1%)', 'details': "While rare, a malfunctioning temperature sensor can send incorrect signals to the vehicle's computer, causing the cooling system to underperform."}
P0A35 Repair Costs
Cost Breakdown by Repair Type
Inverter Cooling Pump Replacement
Replacing a faulty inverter cooling pump is often the most effective solution to resolve the P0A35 code.
- Total: $300 - $600
- Success rate: 85%
Coolant System Flush and Repair
This includes flushing the old coolant and repairing any leaks in the system.
- Total: $150 - $400
- Success rate: 75%
Money-Saving Tips for P0A35
- Start with the most common and least expensive repairs first
- Use GeekOBD APP to confirm diagnosis before replacing expensive parts
- Consider preventive maintenance to avoid future occurrences
- Compare prices for OEM vs aftermarket parts based on your needs
- Address the issue promptly to prevent more expensive secondary damage
Diagnostic Steps
Professional P0A35 Diagnosis Process
Follow these systematic steps to accurately diagnose P0A35. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the inverter cooling pump and fan (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the inverter cooling pump and fan (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes with the GeekOBD APP (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes with the GeekOBD APP (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any reoccurrence of codes (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any reoccurrence of codes (15-20 minutes).
Important Notes
- Always verify the repair with GeekOBD APP after completing diagnostic steps
- Clear codes and test drive to ensure the problem is resolved
- Address underlying causes to prevent code recurrence
Real Repair Case Studies
Case Study 1: Inverter Cooling Pump Replacement on 2015 Toyota Prius
Vehicle: 2015 Toyota Prius, 85,000 miles
Problem: Customer reported check engine light and reduced performance.
Diagnosis: Diagnosed using GeekOBD APP; confirmed P0A35 code with high inverter temperature readings.
Solution: Replaced the faulty inverter cooling pump and flushed the coolant system.
Cost: $450 (parts: $250, labor: $200)
Result: Customer reported improved performance and fuel efficiency after repair.
Case Study 2: Coolant System Flush on 2018 Toyota Prius
Vehicle: 2018 Toyota Prius, 45,000 miles
Problem: Check engine light illuminated, experiencing sluggish acceleration.
Diagnosis: Scanned with GeekOBD APP, confirmed P0A35 and noted low coolant levels.
Solution: Performed a coolant system flush and replaced necessary hoses.
Cost: $200 (parts: $100, labor: $100)
Result: Vehicle returned to normal operation, and the check engine light was cleared.