Q: Exhaust leak unknown location near headers, p0170 code fuel trim malfunction bank 1 and white smoke when sitting in traffic.

asked by on

I have a 2000 mitsubishi eclipse v6 3.0. It has an exhaust leak location unknown but very close to headers if not on the back set. I have had the leak since I bought the car and an occasional lifter tick. The issue is it has been throwing a p0170 code (fuel trim malfunction bank one) as well as white smoke smelling like rich fuel from near the exhaust leak area while sitting in traffic for long periods of time. Would this leak, if before a o2 sensor cause the code and in turn cause the computer to add or subtract fuel causing the white smoke??

My car has 129000 miles.
My car has an automatic transmission.

Hi Kaden. Thanks for contacting us tonight. Usually when an exhaust leak occurs, it will cause the O2 sensors to relay faulty data to the ECU, which triggers the OBD-II code and will impact fuel trim, air mixture and several other problems. Essentially, when the exhaust system is compromised, the entire system become inconsistent. It’s best to repair the exhaust leak before trying to resolve the OBD-II code you’ve got, as you’ll be chasing repairs eventually till the exhaust leak is fixed.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Exhaust leak unknown location near headers, p0170 code fuel trim malfunction bank 1 and white smoke when sitting in traffic.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Why does my Engine sounds like a tractor.

Hey there. Your symptoms sound like many of your problems may be coming from a failed engine mount. The engine mount can fail and allow some extra movement of the engine and transmission assembly. To have this verified, a certified...

Q: My car will be in neutral but still stays at 1500 or 2000 rpms while driving

There are a number of things that can make a car jerk while you are cruising. Many of them would bring up a check engine light, but there are a few, like fuel pressure problems, that might not. With a...

Q: What do I do if my MAF sensor is acting up?

Before purchasing a new MAF sensor, I would find out why it is failing so you do not damage the new one as soon as you install it. If you think the failure is from getting oil contaminated from...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...