The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2017 Mazda 6 Loss of Power and P0087 Code

0

Chris P. · rep 0 · May 22, 4:48 AM · 1 replies · solved · Question

Vehicle: 2017 Mazda 6 Sport

Hello everyone,

I'm having a significant problem with my 2017 Mazda 6 Sport, which has about 80,000 miles. While driving on the highway, I experienced a sudden and severe loss of power. The car felt like it was struggling to accelerate, and I had to pull over. The check engine light came on, and the car went into what I assume is 'limp mode'.

I managed to get it home, and when I scanned it, I got the code P0087: "Fuel Rail/System Pressure - Too Low." This sounds like a fuel delivery issue, but I'm not sure where to start. Could it be the fuel pump, or something else?

Has anyone with a 2017 Mazda 6 or similar model encountered this specific code and problem? What was the diagnosis and fix? I'm trying to gather as much information as possible before taking it to a mechanic. Thanks for your help!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:48 AM

0

ClearTheCode admin answer:

The P0087 code, indicating "Fuel Rail/System Pressure - Too Low," is a critical diagnostic trouble code that points directly to an issue with your 2017 Mazda 6's fuel delivery system. This can indeed cause a significant loss of power and put the vehicle into limp mode. Here's a breakdown of potential causes and actions:

  1. Clogged Fuel Filter:

    • Cause: A dirty or clogged fuel filter restricts the flow of fuel to the engine, leading to insufficient pressure in the fuel rail.
    • Action: While some Mazda models have a 'lifetime' fuel filter integrated with the fuel pump, others have a replaceable inline filter. Check your vehicle's service history or owner's manual for recommendations. If replaceable, this is a relatively inexpensive first step.

  2. Failing Fuel Pump (Low-Pressure or High-Pressure):

    • Cause: Mazda's Skyactiv engines use both a low-pressure fuel pump (in the tank) and a high-pressure fuel pump (HPFP) on the engine. Either can fail, leading to inadequate fuel pressure. The low-pressure pump supplies fuel to the HPFP, which then pressurizes it for direct injection.
    • Action: A mechanic can test the pressure output of both pumps. A failing low-pressure pump might not supply enough fuel to the HPFP, or the HPFP itself could be failing to achieve the required high pressures.

  3. Faulty Fuel Pressure Sensor:

    • Cause: The fuel pressure sensor monitors the pressure in the fuel rail. If this sensor is faulty, it might report incorrect low-pressure readings even if the actual pressure is adequate.
    • Action: A diagnostic tool can monitor the sensor's live data. If readings are erratic or consistently low despite other components testing fine, the sensor might be the issue.

  4. Fuel Line Restriction or Leak:

    • Cause: A kinked fuel line or a leak in the fuel system can prevent proper pressure from building up.
    • Action: Visually inspect the fuel lines for any obvious damage or leaks. This is less common but worth checking.

When to See a Shop: Given the severity of the P0087 code and the limp mode, it's crucial to have your 2017 Mazda 6 inspected by a professional mechanic or Mazda dealership as soon as possible. Driving with insufficient fuel pressure can cause further damage to the engine or catalytic converter. They have the specialized tools to accurately diagnose fuel pressure, test pumps, and identify the root cause safely and effectively.

Menu

Help & account