The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

Rough idle and occasional stalling, Check Engine Light on 2016 MDX SH-AWD

0

Mike T. · rep 0 · May 26, 3:30 AM · 1 replies · solved · Question

Vehicle: 2016 Acura MDX SH-AWD

Hi everyone,

My 2016 Acura MDX SH-AWD has developed a rough idle recently. It feels like the engine is sputtering a bit when I'm stopped at a light, and a couple of times it's even stalled out completely, though it restarts fine. To top it off, the Check Engine Light (CEL) came on a few days ago and hasn't gone off. The car has about 90,000 miles on it.

I'm planning to get the codes read, but I wanted to see if anyone has experienced similar issues with their 2016 MDX and what the common culprits might be. Could it be spark plugs, or something more serious? Any advice would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:30 AM

0

ClearTheCode admin answer:

Rough idle, occasional stalling, and an illuminated Check Engine Light (CEL) on your 2016 Acura MDX SH-AWD at 90,000 miles can indicate several common engine-related issues. Getting the OBD codes read is the crucial first step, as they will provide specific direction.

Common Causes (often indicated by specific OBD codes):

  1. Misfires (P030X codes): Faulty spark plugs, ignition coils, or fuel injectors are common causes of misfires, leading to rough idle and potential stalling. P0301, P0302, etc., indicate a misfire in a specific cylinder, while P0300 is a random/multiple misfire.
  2. Oxygen Sensors (P013X, P014X codes): Failing O2 sensors can send incorrect data to the engine control unit (ECU), leading to an incorrect air-fuel mixture, rough idle, and reduced fuel economy.
  3. Catalytic Converter Efficiency (P0420, P0430 codes): If misfires have been occurring for a while, it can damage the catalytic converter, leading to efficiency codes. This can also cause rough running.
  4. Mass Air Flow (MAF) Sensor (P010X codes): A dirty or faulty MAF sensor can provide incorrect air intake readings, affecting the air-fuel ratio and causing rough idle or stalling.
  5. Vacuum Leaks: Leaks in vacuum lines can introduce unmetered air into the engine, disrupting the air-fuel mixture and causing a rough idle.

What to Check/Do:

  1. Get OBD Codes Read: This is paramount. Most auto parts stores offer free code reading services. Write down all codes present.
  2. Basic Maintenance: When were the spark plugs last replaced? At 90,000 miles, if they haven't been, they are due. A dirty air filter can also contribute to poor engine performance.

When to See a Shop:

  • Immediately after getting the codes read. Do not ignore a persistent CEL, especially if accompanied by stalling.
  • If the engine performance significantly degrades, or if the stalling becomes frequent.
  • If the codes point to complex issues like catalytic converter failure or fuel system problems.

Once you have the OBD codes, an Acura dealership or a reputable independent mechanic can diagnose the root cause. They can perform specific tests, such as checking fuel pressure, ignition coil resistance, or vacuum integrity, to pinpoint the exact issue and recommend the appropriate repair. Addressing misfires promptly is important to prevent damage to other expensive components like the catalytic converter.

Menu

Help & account