The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2023 Dodge Hornet GT - Turbo Lag and Occasional Limp Mode

0

Dan C. · rep 0 · May 22, 5:39 AM · 1 replies · solved · Question

Vehicle: 2023 Dodge Hornet GT

Hey everyone, I've got a 2023 Dodge Hornet GT with the 2.0L turbo engine, and I'm experiencing some frustrating issues. I've noticed significant turbo lag, especially from a stop or when trying to accelerate quickly. It feels like there's a real delay before the power kicks in.

Even more concerning, a couple of times now, the car has gone into what feels like 'limp mode' – reduced power, and the check engine light comes on. After I restart the car, it usually goes away, but it's happened twice in the last month. It's got about 15,000 miles on it.

Is this normal for a new turbo engine, or should I be worried? What could be causing this? Any advice for a new Hornet owner would be great!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:39 AM

0

ClearTheCode admin answer:

Experiencing significant turbo lag and occasional limp mode in your 2023 Dodge Hornet GT is definitely not normal, especially for a vehicle with only 15,000 miles. These symptoms indicate a potential issue with the turbocharger system, fuel delivery, or engine management. Given it's a newer model, it's important to address this promptly.

Common Causes:

  1. Turbocharger Wastegate/Actuator Issues: The wastegate controls exhaust flow to the turbo. If it's sticking open or the actuator is faulty, the turbo won't build boost efficiently, leading to lag and underboost conditions.
  2. Boost Leak: A leak in the intercooler piping or vacuum lines can prevent the turbo from maintaining proper boost pressure, causing reduced power and lag.
  3. Faulty Boost Sensor (MAP/MAF): Incorrect readings from the Manifold Absolute Pressure (MAP) or Mass Air Flow (MAF) sensor can cause the engine control unit (ECU) to miscalculate air/fuel mixture and boost targets.
  4. Fuel Delivery Problems: Issues with the fuel pump (high-pressure or low-pressure), fuel injectors, or fuel pressure sensor can lead to insufficient fuel delivery, especially under boost, triggering limp mode.
  5. ECU Software Glitch: Less common, but sometimes a software bug or calibration issue can cause these symptoms, especially in newer models.

Diagnostics & Next Steps:

  1. Retrieve OBD-II Codes: When the car goes into limp mode and the check engine light comes on, specific codes are stored. Common codes for these symptoms include:
    • P0299: Turbocharger/Supercharger Underboost
    • P0087: Fuel Rail/System Pressure - Too Low
    • P0101: Mass Air Flow (MAF) Sensor Performance
    • P0128: Coolant Thermostat (Coolant Temp Below Regulating Temperature) - less likely but can affect performance.
  2. Check for Visible Leaks: Inspect all turbocharger hoses, intercooler pipes, and vacuum lines for any cracks, loose clamps, or disconnections.
  3. Document Occurrences: Note down when the limp mode occurs (e.g., specific driving conditions, engine temperature) to help with diagnosis.

When to See a Shop:

  • Immediately: Since your vehicle is still under warranty, take it to a Dodge dealership as soon as possible. Do not attempt extensive DIY repairs, as this could void your warranty. The dealership has access to specific diagnostic tools and software updates for your Hornet.
  • Do not ignore: Limp mode is a protective measure. Repeatedly driving with these issues can lead to damage to the turbocharger, catalytic converter, or other engine components. Provide the dealership with all the details you've observed, including any specific OBD-II codes you might have pulled.
Menu

Help & account