KNOWN FAULTS · Toyota
Known faults for the Toyota Prius+.
2012–2021 · 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: 1.8 Hybrid (Hybrid)
Applies if: The documented cases are 2010–2015 cars.
Clogged EGR and head gasket on the 1.8 hybrid (2ZR-FXE)Engine
- Engine / equipment
- 1.8 hybrid (2ZR-FXE): Prius III, Prius+ and Auris hybrid
- Period mentioned
- Approx. 2010–2015
- Symptoms
- Knocking or rattling on cold start, misfires (P0301–P0304), coolant loss and, eventually, a damaged head gasket.
- Possible cause described
- The EGR cooler and passages clog with soot; uneven gas distribution causes knock and misfires that end up damaging the head gasket. Toyota issued a technical bulletin (T-SB-0116-15) for the 2010–2015 Prius.
- Check for the garage
- Read the misfire codes, watch the coolant level and clean the EGR cooler, valve and manifold preventively; if coolant is lost with no visible leak, run a combustion-gas test.
- 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
View full entryEngines: 1.8 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 for this model
- 1.8 HybridHybrid