Question about 1995 Volvo 850

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OBD II DTC P0172

The code is Bank 1 fuel to rich. What are some things I can check before taking it to the dealer.

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P0172 is not a volvo code so may not be correct but converted to volvo is code 250a long term fuel upper limit (lean vac leak) ck all vac hoses and replace the canister purge valve mounted on the radiator (about $40.00 part) then reset all codes

Posted on Aug 26, 2008

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2004 Saturn Ion code p0172


DTC P0172: Bank 1 system too rich.
Probable causes:
1. Fuel pressure. Check pump, regulator, filter, and lines
2. Vacuum leaks, damaged hoses, or incorrect routing
3. Air filter or intake restrictions
4. Faulty fuel injector(s)

Dec 18, 2016 | Saturn Ion Cars & Trucks

1 Answer

What does p0172 stand for


P0172 OBD-II Trouble Code: Fuel System Too Rich ( Engine cylinder Bank 1)

Nov 24, 2016 | Cars & Trucks

1 Answer

CODE CO441, P0172, P1174


DTC P0172: Fuel Trim System Rich
DTC P1174: Air Fuel Imbalance Bank 1
Your best bet is to take it to a ASE certified repair shop or dealer < It's going to take special diagnostic tools to trouble shoot an fix this problem .

Jan 06, 2016 | 2008 Chevrolet Uplander

1 Answer

What does a digital trouble code P0172 mean?


System Too Rich (Bank 1) What does that mean? Basically this means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. Note: This DTC is very similar to P0175, and in fact your vehicle may show both codes at the same time. Symptoms You will more than likely not notice any drivability problems, although there may be symptoms such as a misfire. Causes A code P0172 may mean that one or more of the following has happened: The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry. There could be a vacuum leak. There could be a fuel pressure or delivery problem Possible Solutions Possible solutions include: Inspect all vacuum and PCV hoses, replace if necessary Cleanthe MAF sensor. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling Inspect fuel lines for cracks, leaks, or pinches Check the fuel pressure at the fuel rail Check the fuel injectors, they may be dirty. Use fuel injector cleaner or get them professionally cleaned/replaced. Check for an exhaust leak before the first oxygen sensor (this is unlikely to cause the problem, but it is possible)

Read more at: http://www.obd-codes.com/p0172
Copyright © OBD-Codes.com

May 07, 2015 | 2001 Mercury Villager

1 Answer

P0172 code. Check Engine light on. Vehicle will not start now


What make and model car ? P0172 OBD II Trouble Code could be running so rich that it fouled the sparks . Pull out the spark plugs and see if there are wet with fuel and black, means that they are fouled out. Have to be cleaned or replaced . I don't know the make of vehicle , so I can only give approximation what mite have caused this , a fuel pressure regulator with a ruptured diaphragm leaking fuel into the intake manifold, leaking fuel injectors P0172 System Too Rich Bank 1

Dec 20, 2014 | Cars & Trucks

1 Answer

2000 tundra v6 dtc p0172


172, are USA standard, spec, DTC error.
and as such , all posts covering it should be same.
P0 means fed, rules.
this only means, this sensor reads too rich.
mostly it is 2 things, #2 is vast things.
1: the sensor is bad. B1S1. (bank1sensor 1) sensor 1 is front.
2: Air fuel ratio , fueling is very very rich,

a technician does more tests to find the true cause.
You could replace and over 100k mile sensor, and find it still throws
172s./
that means the EFI is out of control, its rich for many reasons
1: too high fuel pressure? use a gauge.
2: leaking injectors. (same gauge above doing the leak down test stated in the FSM. and not skipping the injector balance tests.)
3: Misfire , for any reasons, (vast) that cause EFI to go rich.

hard to beat this list, but there are many tests to do
even coolant temps, wrong.

http://repairpal.com/OBD-II-Code-P0172-and-P0175



Jan 31, 2014 | 2000 Toyota Tundra

1 Answer

Need to find out what po172 code is


P0172 OBD-II - System Too Rich (Bank 1)

Basically this means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC is very similar to P0175, and in fact your vehicle may show both codes at the same time.

Symptoms: You will more than likely not notice any drivability problems, although there may be symptoms such as a misfire.

Causes: A code P0172 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
* There could be a vacuum leak.
* There could be a fuel pressure or delivery problem

Possible solutions include:
* Inspect all vacuum and PCV hoses, replace if necessary
* Cleanthe MAF sensor. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
* Inspect fuel lines for cracks, leaks, or pinches
* Check the fuel pressure at the fuel rail
* Check the fuel injectors, they may be dirty. Use fuel injector cleaner or get them professionally cleaned/replaced.
* Check for an exhaust leak before the first oxygen sensor (this is unlikely to cause the problem, but it is possible)


Hope helps (remember rated and comment this).

Sep 02, 2010 | 2003 Chevrolet Cavalier

1 Answer

Speedometer sudenly stoppped working. now works intermittently. also shows check engine light. It is showing p0171 & p0172 codes. Lean and rich. seams like they contradict each other. occasionaly the...


P0171 indicates a lean condition. The most common cause of this is a defective mass air flow sensor. Also check if any vacuum leaks.Replace MAf sensor,if cleaning the MAF does not help.
OBD II P0172 Fuel System Too Rich (Bank 1).P0172 - System Too Rich (Bank 1) Essentially this DTC means that an oxygen sensor in bank 1 detected a rich condition.
When the code says that the Fuel System is "too rich," it means that the computer has been subtracting more and more fuel, which is called Long Term Fuel Trim. Ideally, the Long Term Fuel Trim should be close to 1 to 2 percent. When a code P0172 is set, it means that the Fuel Trim is anywhere from -15 percent to as low as -30 percent compensated. When this happens, the computer knows that there is an improper condition in the control of the Fuel System.


Thanks.

Feb 07, 2010 | 1996 Volvo 850

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