P0172 OBD Engine Code Logo   Code #P0172 -
System too Rich (Bank 1)

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the engine starts but it shakes too much, it does the same when is running and it feels weak, no power and a lot of fume come out from the muffler.

Nissan X-Trail

Chevrolet Optra
codigo p0172

checking all wires and plugs changed speed sensors

running rich on cold startup, ok warm

took 60+ mile drive in hilly & twisty terrain on a 70+ degree spring day. 2005 kia rio, oil change 7 days ago & air filter changed dec '12. looking up what's most important to try 1st to avoid wasting $ assuming it's either cheapest or most expensive fix.

Ford E-150

Toyota Yaris
Engine Light on, car start yes, car shake yes, idle roughly yes

Volkswagen Beetle
Engine light came had code check said PO172 map sensor had been clean seem to run okay

Just had code checked map sensor was clean a week ago same code back again

Volkswagen Beetle
Code PO172 had map sensor clean back on again in a week engine seem to be running okay


Chevrolet Trailblazer
does start, no vibrate, not rough, reduced power

it appear the code and i can not clear that.. and it is working good but the code doestn clear

Kia Rio
the car works good but the check engine light is on. i tried to clear but it doesnt clear..

p0 300 po 172

po172 po300


Chevrolet Impala
P0172 is indicative of Bank 1 running too rich (receiving too much fuel) on V-type engines or high performance inline engines. It causes the check engine light to illuminate, but beyond that, the car runs and drives as it should, often times with no noticeable difference in performance. Possible causes could be, but are not limited to, dirty or faulted Mass Air Flow sensor, dirty injectors, clogged PCV valve or hose, or damaged vacuum line.

when i start the truck it idles roughly then check engine light comes up giving me a PO170 bank 1 to rich.

Dodge Dakota
what should the injectors read

Lincoln LS
rough idle while stopped rotten egg smell loss of power rpm wont go over 2000

rough idle while stopped rotten egg smell loss of power rpm wont go over 2000

Toyota Rav4

Pro 172

Chrysler PT Cruiser
i have my car engine too much shake

what make it run rich

Pontiac Montana
what makes it run rich

Hyundai Elantra
All the above occurred on my car Please advise Hyundai elentra 2008

Mercedes-Benz ML350
Check the MAF sensor signal!

code po172, miss fires on 2, 4, cylinders

car back fires

No trying to get some answers on how to correct the issue

Chevrolet Optra
p0432 code chart diagnotics

Chevrolet Optra
p0432 code fault

no power wont go over 10 mph. misfiring. replaced plugs and all 4 coils

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When did your Check Engine Light Come On?
Does your Car Start?
Does your Car Vibrate? Shake?
Does your Car Idle Roughly? Reduced Power?

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Other Comments

P0032 Had fault code p0031 at first. So replace the o2 sensor on bank 1 sensor 1 after replacing the sensor fault code p0032 came on

P0481 a/c fan and cooling fan turn slow

P0342 Kia Sorento
p0342 code let sit overnight now it starts

P0238 replaced turbo sensor, still stores same code

P0520 oil pressure reading low on gauge

Other Check Engine Light Codes

P0134   O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
P0170   Fuel Trim (Bank 1)
P0331   Knock Sensor 2 Circuit Range/Performance (Bank 2)
P0406   Exhaust Gas Recirculation Sensor 'A' Circuit High
P0610   Control Module Vehicle Options Error
P0728   Engine Speed Input Circuit Intermittent
P0773   Shift Solenoid 'E' Electrical
P0778   Pressure Control Solenoid 'B' Electrical
P0834   Clutch Pedal Switch 'B' Circuit Low
P0879   Transmission Fluid Pressure Sensor/Switch "D" circuit Intermittent

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