KNOWN FAULTS · Toyota
Known faults for the Toyota Prius (II).
2003–2009 · Hybrid
Sources are not verified in real time and no entry confirms that your car is affected.
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2 known faults with sources
Engines: 1.5 Hybrid (Hybrid)
Clogged hybrid battery cooling fan and filterHigh-voltage battery
- Engine / equipment
- Hybrid battery cooled with cabin air (intake next to the rear seat): Prius, Yaris, Auris, Corolla, C-HR, RAV4, Camry and others
- Period mentioned
- 2003 onwards
- Symptoms
- Hybrid battery cooling maintenance message, warning light with codes P0A80 or P0A7F, a noisy fan and less electric assistance; if ignored, the battery ages faster.
- Possible cause described
- Dust, pet hair or dirt block the filter and fan that cool the battery; so do objects covering the intake. Toyota USA issued bulletin T-SB-0074-20 (2003–2020 Prius and Camry, Corolla, Highlander, RAV4 and Mirai hybrids up to 2020) and recommends cleaning the filter every 5,000 miles (about 8,000 km).
- Check for the garage
- Clean or replace the filter and clean the fan before condemning the battery; keep the intake grille clear. At the garage, read the codes and, if needed, install the software Toyota specifies.
- Cost cited in the source
- No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.
Sources from the original database
Toyota technical bulletin T-SB-0074-20 (NHTSA): P0A80/P0A7F due to dust in the battery cooling fan and filterToyota tech tip T-TT-0432-17 (NHTSA): HV battery cooling filter maintenanceTustin Toyota: how often to inspect the hybrid battery air filter
View full entryEngines: 1.5 Hybrid (Hybrid)
Prius inverter coolant pumpElectric powertrain
- Engine / equipment
- Hybrid inverter cooling circuit
- Period mentioned
- 2003–2015
- Symptoms
- Hybrid-system warning, a fan that keeps running with the car off and a risk of the inverter overheating.
- Possible cause described
- The electric pump of the inverter circuit can fail; without circulation, the inverter and transmission overheat. Using a coolant other than specified can clog the passages.
- Check for the garage
- Check the inverter reservoir level and whether the coolant circulates, read the codes and test the pump before condemning the inverter; ask Toyota about campaigns for the VIN.
- Cost cited in the source
- No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.
Sources from the original database
Underhood Service: tech tip on the Prius inverter coolingPriusChat (forum): inverter coolant pump recall
View full entryEngines for this model
- 1.5 HybridHybrid