Question about 1997 Chevrolet Cavalier

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Systen too lean (bank 1) - 1997 Chevrolet Cavalier

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  • yadayada
    yadayada May 11, 2010

    what engine do you have? what is the trouble code?

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  • 298 Answers

CHECK FUEL PRESSURE IF OK CHECK ON DATA COOLANT SENSOR THERE CAN BE MORE CAUSES ON THIS SYSTEM

Posted on Jun 29, 2009

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Posted on Jan 02, 2017

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SOURCE: Code P0172, systen too rich Bank 1

Look into the MAP sensor ( manifold absolute pressure sensor)

If you have a code reader you can read freeze frame data.

Posted on Apr 04, 2010

  • 831 Answers

SOURCE: Generic code PO171 system 2 lean bank 1 generic

This can be caused by a faulty mass air flow sensor

Posted on Jul 09, 2010

  • 193 Answers

SOURCE: PO171B Bank 1 System

Engine lean means you are getting too much air in relation to the amount of fuel. Thats the easy part the hard part is fixing it.Many different factors cause this. If your vacuum hoses leak anywhere under the hood or under the dash, If your evap system has a leak, EGR or PVC valves can be leaking If your intake manifold gaskets leak it will also show running lean. If you are running without an air filter or leaks around the air filter or if your gas cap gasket is worn. This is probably the hardest code to fix. If you just start changinng the parts it will cost a fortune. You may want to find a trusted mechanic and let them do it. Good Luck

Posted on Sep 26, 2010

c1apton15
  • 3400 Answers

SOURCE: I,m getting "ECM dected bank 1 02 at its lean

Bank 1 = drivers side (IE: 02 sensor bank1 = driver O2 sensor pre cat. converter)

Posted on Mar 17, 2011

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2000 Lincoln Navigator - few days ago started idling very rough when truck is at a stop or in park. Service Engine Light came right around time I noticed that it was idling rough when stopped. Following...


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Fuel Filter -Plugged
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I,m getting "ECM dected bank 1 02 at its lean


Bank 1 = drivers side (IE: 02 sensor bank1 = driver O2 sensor pre cat. converter)

Mar 17, 2011 | 2002 Ford Explorer

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P2197 p2187 p2177 p2195 p2179 p2189


P2197 - Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
P2187 - System Too Lean At Idle Bank 1
P2177 - System Too Lean Off Idle Bank 1
P2195 - Oxygen Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1
P2179 - System Too Lean Off Idle Bank 2

I am not sure what your Mazda is, but from the sounds of it, both of your Oxygen Sensors are shot. Replace them both, or check for vacuum leaks. It may be a good time to inspect and replace the PCV Valve and PCV Valve hose, too.

Mar 12, 2011 | Mazda MAZDA6 Cars & Trucks

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What do the codes 1128, 1129, 1133, and 1134 mean on my Porsche Boxter 2001?


code P1128 02 sensor bank 1 lean
code P1129 02 sensor bank 1 lean to limit
code P1133 02 sensor bank 2 lean
code P1134 02 sensor bank 2 lean to limit

fuel system is lean.

Jan 29, 2011 | 2001 Porsche Boxster

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PO171B Bank 1 System to Lean And PO174B Bank 2 Systen to Lean


Engine lean means you are getting too much air in relation to the amount of fuel. Thats the easy part the hard part is fixing it.Many different factors cause this. If your vacuum hoses leak anywhere under the hood or under the dash, If your evap system has a leak, EGR or PVC valves can be leaking If your intake manifold gaskets leak it will also show running lean. If you are running without an air filter or leaks around the air filter or if your gas cap gasket is worn. This is probably the hardest code to fix. If you just start changinng the parts it will cost a fortune. You may want to find a trusted mechanic and let them do it. Good Luck

Sep 26, 2010 | Ford F-450 Cars & Trucks

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P0313;Misfire Detected with low fuel P0171-System too lean{bank1} P0174 System too lean{bank2} drive cycle


P0313 - Misfire Detected with Low Fuel
P0174 -System too Lean (Bank 2).
P0171 -System too Lean (Bank 1).

P0171 and P0174 mean "system too lean" for banks 1

Aug 24, 2010 | 2000 BMW 3 Series

1 Answer

2006 hundai elantra P2270 code. If this is an O2 sensor, which one?


Possible O2 sensors:

P2270 O2 Sensor Signal Stuck Lean Bank 1 Sensor 2
P2271 O2 Sensor Signal Stuck Rich Bank 1 Sensor 2
P2272 O2 Sensor Signal Stuck Lean Bank 2 Sensor 2
P2273 O2 Sensor Signal Stuck Rich Bank 2 Sensor 2
P2274 O2 Sensor Signal Stuck Lean Bank 1 Sensor 3
P2275 O2 Sensor Signal Stuck Rich Bank 1 Sensor 3
P2276 O2 Sensor Signal Stuck Lean Bank 2 Sensor 3
P2277 O2 Sensor Signal Stuck Rich Bank 2 Sensor 3
P2278 O2 Sensor Signals Swapped Bank 1 Sensor 3 / Bank 2 Sensor 3
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This is Bank 1 (closer to the dash panel) Sensor 2 (located after the catalytic converter).

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Note: A malfunctioning front oxygen sensor may cause fuel trim codes to set.
  1. Several Diagnostic Trouble Codes use specific terminology to refer to sensor location. The illustration and key below explain the following terms:
  2. Engine BANK Bank 1 is closer to the dash panel, (also referred to as RH or right hand). Bank 2 is closer to the radiator, (also referred to as LH or left hand).
  3. UP Refers to Sensor 1 or "front sensor". It is located closer to the exhaust manifold and before the catalytic converter.
  4. DOWN Refers to Sensor 2 or "rear sensor." It is located after the catalytic converter.
  5. The following examples show how to interpret oxygen sensor terminology:
  6. B1/S1 = Bank 1/Sensor 1 = Dash panel side, BEFORE the catalyst or "upstream"
  7. B2/S2 = Bank 2/Sensor 2 = Radiator side, AFTER the catalyst or "downstream"

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Generic code PO171 system 2 lean bank 1 generic


This can be caused by a faulty mass air flow sensor

Jul 06, 2010 | 1999 Ford Taurus

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Code P0172, systen too rich Bank 1


Look into the MAP sensor ( manifold absolute pressure sensor)

If you have a code reader you can read freeze frame data.

Apr 04, 2010 | 1996 Jeep Grand Cherokee

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