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How much will it cost to fix error p0172 - Cars & Trucks

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That is just an oxygen sensor

The code doesn't mean it is bad

Bank #1 is too rich-that could be a leaking injector

You can change O2 sensors yourself --IF necessary

They cost around $60 from rock auto.com

I would have the issues diagnosed,you may not
need any parts

Posted on Dec 07, 2012

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What are the probable causes of DTC P0172?


If the PCM detects an excessively rich condition, DTC P0172 or P0175 sets.
Possible cause's , leaking fuel injectors , leaking fuel pressure regulator .
Possi GM CPI Leak Part 1 bleed down testing P0172 code

May 02, 2016 | 2001 GMC Safari

1 Answer

I need to know what code means 0172 and how much it cost


P0172 is "system too rich Bank 1"
There are many things that can cause this. The vehicle should be taken to a capable shop and be diagnosed and give you an estimate for repair.
P0172 System Too Rich Bank 1

Oct 13, 2015 | Cars & Trucks

1 Answer

P0172 2003 trailblazer


P0172 states that the "bank 1" side of the engine is running too rich.
Here is a link explaining it in more detail and giving possible causes and solutions.


http://www.obd-codes.com/p0172

Apr 14, 2015 | 2003 Chevrolet TrailBlazer

1 Answer

Light check engine obd p0172


Error Code: P0172
Fault Location:
Fuel Trim, System too Rich, Bank 1
Possible Cause:
Evaporation emission (EVAP) canister purge valve.
Fuel pressure.
Fuel Injector(s).
Heated oxygen sensor (HO2S).
Mass air flow sensor.
Engine coolant temperature sensor.
Element air cleaner, clogged.

Dec 08, 2013 | Toyota ECHO Cars & Trucks

1 Answer

P0171 p0172


Here's code PO171.Here's code P0172.

May 08, 2013 | Ford Explorer Cars & Trucks

1 Answer

I have a few error codes for my 2004 dodge ram hemi 1500 4x4. they are po172, po300, and po304.


The p0172 is due to an O2 sensor in the exhaust seeing too much oxygen, the po300 is a missfire present and p0304 is cylinder #4 missfire, check plug and wire to #4 and repair, this should also take care of the p0172, if a cylinder is missing it is just pump air into the exhaust thus causing the code p0172.

Jan 13, 2012 | Cars & Trucks

1 Answer

2002 dodge durango 4.7L SLT Plus with lack of power with service engine light on and p0172 error code


error code P0172: system too rich(bank 1)
In my opinion, replace the oxygen sensor.

Dec 13, 2010 | Dodge Durango Cars & Trucks

1 Answer

2.0 engne - errors codes p0134, p0172, p1128. What is the problem and how od i fix it?


Trouble Code: P0134


HO2S (Bank 1 Sensor 1) Circuit No Activity

Possible Causes:


Leaks present in the exhaust manifold or exhaust pipes

HO2S signal wire and ground wire crossed in connector (voltage jumps)

HO2S element is fuel contaminated or has failed

ECM has failed



Trouble Code: P0172


Fuel System Too Rich (Cylinder Bank 1)

Possible Causes:


Camshaft timing is incorrect, or the engine has an oil overfill condition

EVAP vapor recovery system failure (may be pulling vacuum)

Fuel pressure regulator is damaged or leaking

HO2S element is contaminated with alcohol or water

MAF or MAP sensor values are incorrect or out-of-range

One of more fuel injectors is leaking



Trouble Code: P1128


Long Term Fuel Trim Add. Air. Bank 1 System Too Lean

Possible Causes:


Fuel pressure is too low or fuel quantity supplied is too low

Fuel filter faulty

Transfer fuel pump has failed

Fuel injector is faulty (sticking or not opening)

Engine speed (RPM) sensor is faulty

MAF sensor circuit open

MAF sensor circuit shorted to ground

Air leak in the manifold

Secondary air injection system combi-valve stuck open

Secondary air injection system electrical short

ECM has failed

May 24, 2009 | 2000 Volkswagen Beetle

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