Plug-in Hybrid Electric Vehicles (PHEVs) combine internal combustion engines with electric motors, leading to unique maintenance challenges. Here are the most common issues:
1. Internal Combustion Engine Wear
PHEV engines frequently start/stop at any point in their stroke due to intermittent electric motor use. This irregular operation can accelerate wear on components like timing chains, potentially causing stretching and valve damage if not properly maintained. Regular engine warm-ups (especially when the battery isn’t fully charged) are recommended to reduce strain.
2. Battery Degradation
Though less severe than full EVs, PHEV batteries still lose capacity over time, reducing electric-only range. Degradation rates vary, but long-term ownership may require costly battery replacement (often $5,000+ if out of warranty). Most manufacturers offer 8-year/100,000-mile battery warranties.
3. Hybrid System Complexity
Dual powertrains increase the number of components needing maintenance, including:
- Fluid checks (engine oil, transmission, coolant)
- Electric motor servicing
- Power electronics diagnostics
These systems often require specialized tools and expertise, raising repair costs compared to conventional vehicles.
4. Brake System Maintenance
While regenerative braking reduces wear on physical brakes, PHEVs still rely on friction brakes during sudden stops. Components like calipers and pads may still require periodic inspection.
5. Software and Control System Issues
Hybrid powertrains depend on complex software to manage power distribution. Glitches can cause drivability problems, requiring dealership-level updates or component resets.
Key Maintenance Tips
- Regularly start the engine to prevent oil starvation and uneven wear.
- Monitor battery charge levels to avoid deep discharges that accelerate degradation.
- Follow manufacturer guidelines for hybrid-specific service intervals.
PHEVs demand proactive maintenance to balance the demands of both combustion and electric systems effectively.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/what-are-the-most-common-maintenance-issues-for-phevs/
