The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2022 Outlander PHEV engine not engaging / charging system warning

0

Emily N. · rep 0 · May 22, 5:33 AM · 1 replies · solved · Question

Vehicle: 2022 Mitsubishi Outlander PHEV GT

Hello everyone,

I own a 2022 Mitsubishi Outlander PHEV GT, and I'm running into a strange issue. Sometimes, when the battery is low and the car should switch to hybrid mode or when I try to force the engine on using the 'Charge' button, the gasoline engine either struggles to start or doesn't engage at all. Instead, I get a 'Charging System Service Required' message on the dash.

This is intermittent, but it's happened a few times now, leaving me with limited power or unable to charge the main battery. The 12V battery seems fine, and I've had no issues with the electric drive system itself. The car has about 25,000 miles.

Could this be related to the engine's starter, a sensor, or something specific to the PHEV's engine management? Any insights would be helpful!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:33 AM

0

ClearTheCode admin answer:

Intermittent engine engagement issues and 'Charging System Service Required' messages on a 2022 Mitsubishi Outlander PHEV point to a complex interaction between the gasoline engine, the hybrid system, and the 12V charging system. This isn't just a simple engine problem; it involves the vehicle's sophisticated power management.

Here are the most likely causes:

  1. 12V Battery Health:

    • Cause: While you mentioned your 12V battery seems fine, even a slight degradation in its capacity can cause issues in a PHEV. The 12V battery is crucial for powering the engine's starter, the hybrid control unit, and various sensors. If it's weak, it might not provide enough current for reliable engine starting, especially when cold or under specific conditions.
    • Action: Have the 12V battery professionally tested for cold cranking amps (CCA) and overall health. Don't just rely on voltage readings.

  2. Engine Starter Motor or Related Circuitry:

    • Cause: The conventional starter motor for the gasoline engine could be failing intermittently, or there might be an issue with its relay or wiring. The PHEV system relies on this starter for initial engine engagement.
    • Action: A technician can test the starter motor and its circuit. This might require specific diagnostic tools for hybrid systems.

  3. Hybrid System Control Module (HSCM) or Engine Control Unit (ECU) Glitch:

    • Cause: The complex interplay between the electric motors, gasoline engine, and charging system is managed by these modules. A software glitch, sensor input error, or internal fault in one of these modules could prevent proper engine engagement and trigger warnings.
    • Action: A dealership or hybrid-specialized shop can perform a diagnostic scan to check for specific fault codes (e.g., P0A0F - Engine Not Starting, P0A0D - High Voltage System Interlock Circuit Low) and check for available software updates.

  4. Auxiliary Charging System Component Failure:

    • Cause: The 'Charging System Service Required' message could indicate an issue with the DC-DC converter (which charges the 12V battery from the high-voltage battery) or other components responsible for maintaining the 12V system when the engine is off.
    • Action: This requires specialized hybrid diagnostics.

When to see a shop: Due to the complexity of PHEV systems, it is strongly recommended to take your Outlander PHEV to a Mitsubishi dealership or a certified hybrid vehicle repair specialist immediately. Intermittent issues can be challenging to diagnose, but they can escalate. Driving with a compromised charging system or engine engagement can leave you stranded or potentially damage other expensive hybrid components.

Menu

Help & account