2 engine codes being thrown, need opinions!

Ram1500BigRed · Oct 7, 2017

So, tonight I was pulling out of my drive way to go get food. Everything was fine until I started going up hill at the end of my road. I gave the truck some gas, then my check engine light started screaming at me, and the whole truck acted like it was hesitating to go. I turned around and headed back home, and my neighbor (who just so happens to be my insurance guy) came over with his engine tester. The engine is throwing 2 codes. P0171, and P0174. 0171 is causing 0174, and I think it's my fuel filter, because 0171 is fuel running too lean. I just am curious what you guys think. It would be greatly appreciated if someone know the solution!

SYKRAMMAN · Oct 8, 2017

Check your fuel pressure, intake and vacuum system for leaks, check pcv, test your MAF sensor and also test o2's.

MADDOG · Oct 8, 2017

Basically this means that an oxygen sensor in bank 1 has detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. The P0171 is one of the more common trouble codes.

This code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses that reading and adjusts to keep the engine running at that optimum ratio

It can also be triggered by a dirty throttle body, a cracked PCV line which also causes a vacuum leak, a faulty PCV valve, a sticking fuel injector, a failed O2 sensor or an exhaust leak between the engine and the first O2 sensor.

Here's some things to try:

Clean your throttle body
Inspect all vacuum and PCV hoses, replace/repair as required
Inspect all hoses and connections in the air intake system
Inspect and/or test the intake manifold gaskets for leakage
Check for a dirty fuel filter and proper fuel pressure
Check the connection and harness at the first O2 sensor.

2 engine codes being thrown, need opinions!

Ram1500BigRed

Junior Member

SYKRAMMAN

Banned

MADDOG

Out Exploring Arizona

Similar threads

Latest posts

Staff online

Members online

Forum statistics

Share this page