Q: Spark Plugs Replacement cause P0170 and P0173?

asked by on

Using yourmechanic.com, mechanic just replaced spark plug replacement on Wednesday (which went great btw!). 2 days later, Check Engine Light came up and I had OBDII Adapter handy that reads P0170 (Fuel Trim Bank 1) and P0173 (Fuel Trim Bank 2). I was wondering if this could be any related? What should I do next?

My car has 111000 miles.
My car has an automatic transmission.

Hello, thank you for using our service and writing in. The fuel trim codes you are pulling are more likely to pertain to the ignition coil than the spark plugs. However these codes are also associated with the mass airflow sensor, and the oxygen sensor. All of which have powers in regulating the engine performance. At this point, you will want to run further tests on each of the components ruling them out one by one. You can use a voltmeter to test the resistance of each coil. The oxygen sensor can also be testing similarly, and the mass airflow sensor should be cleaned. For more help with this process, contact our service department to schedule another appointment.

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. Spark Plugs Replacement cause P0170 and P0173?

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: Truck sputters at 1500 rpms

In some cases, an OBD-II code like you've described can be triggered by the electrical harness attached to a sensor. So, it's possible that the reason you're having this idle problem is due to the harness being faulty as opposed...

Q: Q: Head lamp stays on

A few faults can cause the vehicle to have a headlight that remains on. The most common problems include a wiring short to power, switch issue, or the headlight itself. If you'd like to get this fixed and you're tired...

Q: When I start the car it makes a rattling noise like something is loose.

If the rattling noise occurs when the car is stationary the origin is in the engine/transmission and/or exhaust system. If the identical rattle occurs when the car is moving, too, motor mounts or loose exhaust system components are a possibility....

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.