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2002 saturn sl2 trouble code PO172 rich to bank 1

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It's your fuel injection system bank one would be injector one. so my advice, replace the fuel injectors after first dropping fuel tank and looking for any sediment in base of tank.

Posted on Jun 17, 2011

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Code po172


P0172: Bank 1 system too rich. Probable causes:
1. Fuel pressure. Pump, regulator, filter or lines
2. Vacuum leaks. Damaged hoses or improper routing
3. Restricted air filter or air intake
4. Faulty fuel injector

Mar 23, 2014 | 2004 Chrysler Sebring

1 Answer

Trouble code PO172


Code 172 means the fuel mix is too rich on bank one. If you have a 6 cyl engine there is only one bank of cylinders. The problem could be the O2 sensor or a leaking injector among other things.

Jan 21, 2014 | 1996 Jeep Cherokee

1 Answer

Code po172, po156


Have you had the O2 sensors checked ? Code 172 is for a rich signal from bank one sensor one and code 156 is for a problem with bank two sensor two which is after the catalytic converter.
One of the injectors could be flooding a cylinder, or you could have a faulty sensor.

Jan 18, 2014 | Ford Windstar Cars & Trucks

1 Answer

04 chevy trailblazer code po172?


System running rich. Basically this means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). Bank 1 is the side of the engine that has cylinder #1.

Hope this helps

Mar 09, 2011 | 2004 Chevrolet TrailBlazer

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2002 6 cylinder 3.o engine Ford Ranger. Cold start problem. Bank 1 code PO172 and Bank 2 code PO175. System to rich. Where to start checking.


Changed the air filter lately? Possibly defective O2 sensors, but I doubt it. If air filter and intake are clear, I'd check barometric pressure sensor and mass air flow sensors. Get a Haynes or Chilton's for $25 at Pep Boys for instructions on testing these componenets

Oct 14, 2009 | 2002 Ford Ranger Regular Cab

1 Answer

Check engine light on


Had the same code with an Expedition. Try cleaning the MAF sensor with some carb cleaner. Here is more info on the code:
http://www.aa1car.com/library/ford_lean_codes.htm

Apr 13, 2009 | 2002 Mercury Villager

1 Answer

Car surges at 2700-2800 RPM Check engine light on Code po172


is the software reading the fault right ??

Mar 20, 2009 | 1998 Saturn SC

1 Answer

1996 es300 trouble code po172 and misfireing on all cylinders


Whats going on here is that you have a too rich fuel air mixture. This will cause your misfiring and set off the PO172 Code. Your Bank 1 O2 Sensor is picking up the too rich mixture. This O2 sensor is location on the #1 Cylinder side (so you problem could be in #1/#3/#5 Cylinder). A dirty MAF Sensor, loose plug wire, dirty/broken spark plug, dirty fuel injectors, vacuum leak, and PCV Valve could all be a cause. I would run some injector cleaner through and also clean the MAF Sensor, change your PCV Valve. This would be an easy and cheap start for you. Good luck and thanks for using FixYa!

Sincerely,
JC

Dec 28, 2008 | 2000 Lexus ES 300

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