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2016 Chrysler 200 2.4L Stalling at Low Speeds - P0171

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Chris P. · rep 0 · May 25, 4:21 AM · 1 replies · solved · Question

Vehicle: 2016 Chrysler 200 Limited

Hello everyone,

I'm having a frustrating problem with my 2016 Chrysler 200 Limited, equipped with the 2.4L Tigershark engine. For the past few weeks, it's been stalling out, usually when I'm coming to a stop or driving at very low speeds, like in a parking lot. It just completely dies, and sometimes it's a bit hard to restart immediately.

I managed to get it scanned, and it threw a P0171 code, which is 'System Too Lean (Bank 1)'. I've heard this engine can have issues, and I'm wondering if this is related. I've checked the air filter, and it looks fine. The car has around 75,000 miles.

Any ideas on what might be causing the lean condition and the stalling? Could it be a common issue for this model year and engine?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:21 AM

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ClearTheCode admin answer:

A P0171 'System Too Lean (Bank 1)' code on your 2016 Chrysler 200 with the 2.4L Tigershark engine, especially when combined with stalling at low speeds, points to the engine receiving too much air or not enough fuel. This lean condition can indeed cause stalling as the engine struggles to maintain proper combustion.

Here are the most common causes and diagnostic steps:

  1. Vacuum Leaks:

    • Cause: This is one of the most frequent culprits for a P0171 code. Unmetered air entering the engine after the Mass Air Flow (MAF) sensor (if equipped) or through a cracked vacuum hose, intake manifold gasket, PCV valve, or brake booster line can create a lean condition.
    • Action: Visually inspect all vacuum lines, the intake manifold, and the PCV valve/hose for cracks, disconnections, or signs of dry rot. A professional smoke test is excellent for finding elusive vacuum leaks.

  2. Mass Air Flow (MAF) Sensor:

    • Cause: A dirty or faulty MAF sensor can send incorrect air mass readings to the Engine Control Module (ECM), causing it to miscalculate fuel delivery and run lean.
    • Action: Try cleaning the MAF sensor with a dedicated MAF sensor cleaner. If the problem persists, the sensor may need replacement. Note: The 2.4L Tigershark uses a Manifold Absolute Pressure (MAP) sensor primarily, but a dirty air filter or intake restriction can still impact air measurement.

  3. Oxygen Sensor (O2 Sensor):

    • Cause: A failing upstream (pre-catalytic converter) O2 sensor can provide inaccurate exhaust gas readings, leading the ECM to incorrectly lean out the fuel mixture.
    • Action: A diagnostic scan tool can monitor O2 sensor readings. If the sensor is slow to respond or stuck lean, it may need replacement.

  4. Fuel Delivery Issues:

    • Cause: This includes a weak fuel pump, clogged fuel filter, or dirty/failing fuel injectors. Any of these can restrict fuel flow, leading to a lean condition.
    • Action: Check fuel pressure at the rail (requires specialized tools). If low, the fuel pump or filter might be at fault. Fuel injector cleaning or replacement might be necessary if they are clogged or faulty.

When to see a shop:

  • If you're unable to locate and fix a vacuum leak yourself.
  • If cleaning the MAF sensor (or checking MAP sensor) doesn't resolve the issue.
  • If you suspect fuel system issues, as these require specific diagnostic tools.
  • If the stalling becomes more frequent or dangerous.

Addressing a lean condition is crucial, as it can lead to engine damage over time due to excessive heat and improper combustion.

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