Q: Fuel regulator replaced now showing p0172 and p0170 codes to replace fuel regulator

asked by on March 04, 2018

Dealership said I had a bad fuel regulator. They took my vacuum off and capped it at the intake manifold. Today I replaced fuel regulator and new vacuum hose took the cap off , now I have a check engine light saying to replace my fuel regulator codes read p0172 and p0170. I had no check engine light on before this and car rang great. Both o2 sensors was replaced bout a week ago . What do I do? ☹️ This dealership has gave me hell. Plz help. And do you think the dealer messed with my air/fuel ratio?? I’m lost at this point.

My car has 189000 miles.
My car has an automatic transmission.

The codes P0171 and Po172 can be caused by other sensors like the MAP sensor, BARO sensor or ECT ACT sensors and each sensor will need to be checked to see if one is out of specifications.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

It was having a hard time starting n we changed [fuel pump](/topics-fuel-pump-honda/). After he got new pump in the car will not even turn over now. Battery is good. They took starter out n put new one in n still nothing. Car turned over fine before changing fuel pump???? I don't understand what could I of gone so wrong...

no engine light or codes, no blue or white smoke from tailpipe but smells like burning rubber, esp. when idle. whats wrong?

You should have your exhaust checked to see if you have something like a plastic bag stuck to the exhaust burning and causing smell. If not then check the engine for oil leaks to see if valve cover or oil...

Key turns in ignition tumbler but it gets stuck in the on position and won't start.

Hi there. It is possible that the key lock in the steering column may have broke. This lock is what returns the ignition tumbler back to the rest OFF position. The lock may have broke making the key not move...

1 cylinder is down on compression 2005 Subaru Legacy

Hello - there are several possible causes of low compression on 1 cylinder only. Causes include: burned valve, worn piston rings (not common for a single cylinder), worn camshaft lobes (not allowing full air charging of the cylinder), valve adjustment...

Rear differential noise

The noise is not coming from the pinion seal, but the pinion bearings are bad and this is why the pinion seal is leaking. You will need to have the rear end bearings and seals replaced. If you'd like to...

Went through water Since then my car makes a very loud rattling sound what to do

Have you had the air cleaner checked to see if it got water in it? If the engine sucked in excessive amounts of water then you may have bent a piston rod. Have the engine checked to see where the...

A/C fan blows, but no cold air

Hello. Unfortunately there is not a switch for the seasons on this vehicle. If it is not blowing cold then it is usually an issue with low refrigerant. The system gets low due to a leak and the compressor will...

Related articles

The Top 5 Selling Cars in California in 2012
California California natives are notably environmentally conscious, and this often shows in their choices of vehicles as well. While trucks rarely make it to the top spots, hybrid vehicles are frequently on the list. Though previous years have seen the...
The Best Used Cars to Buy If You're a Personal Assistant
As As a personal assistant, you have a lot of demands placed on your time. Often it’s important that you be able to get around town quickly, running a ton of errands, picking things up here, dropping them off there,...
A Buyer’s Guide to the 2012 Honda Civic Hybrid
With With more and more consumers looking for better fuel efficiency, hybrid cars are taking off in ways that most of us never thought possible. Today, America’s top-selling compact car, the Honda Civic, is offered in a hybrid model with...