Question about 1996 Chevrolet Suburban

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Bank 1 lean fuel trim , heated 02 on bank 1 senor 1 low volt and bank 2 senors 1 low volts according to the scanner there not and tere all working w/ the same amount of volts and there all moving together, this is a 1996 chevy surb w/5.7l

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  • strictlybiz Oct 03, 2009

    no i have no exhaust leaks

  • lexbev May 11, 2010

    do you have any exhaust leaks?

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  • Chevrolet Master
  • 22,156 Answers

Throw scanner in teh bin and use old motto ,if it works leave well alone

Posted on Oct 03, 2009

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Looking for what a code P0170 could mean for a 2002 gmc envoy ? I already replaced map sensor and still continue to have the same problem


For this code, you need to look at live data on the scanner. Add upstream O2 sensor data for bank 1 to the scanner display and start the engine. P0170 indicates bank one is out of range. Does bank one read higher or lower than normal? Normal is around 0.5 volts. If higher, you are too rich. If lower, you are too lean. If too rich, you may have a leaky injector. If lean, you may have a vacuum leak or dirty injectors.

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I need to replace bank 1 senor 1 on a 2005 Avalon and bank 1 senor 2.


bank 1 is the front bank closest to the grill
sensor 1 is the heated oxygen sensor and is located in the manifold or before the cat converter
sensor 2 is the oxygen sensor and is located after the cat converter
get a specialist oxygen sensor tool so that the small wires are not damaged during repalcement

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I have a PO171 code on my 1999 Jeep grand cherakee larado can You tell me how to fix it, Thank You.


  • Dale, code P0171 fuel system too lean
  • Possible causes
  • change fuel filter first, if it has not been done recently
RESTRICTED FUEL SUPPLY LINE
FUEL PUMP INLET STRAINER PLUGGED
FUEL PUMP MODULE
O2 SENSOR
O2 SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
O2 SENSOR HEATER OPERATION
TPS VOLTAGE GREATER THAN 0.92 VOLTS WITH THROTTLE CLOSED
TP SENSOR SWEEP
MAP SENSOR OPERATION
ECT SENSOR OPERATION
ENGINE MECHANICAL PROBLEM
FUEL FILTER/PRESSURE REGULATOR (HIGH)
PCM
Check the attached links,
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

2000 Jeep Grand Cherokee p0171

Possible problems related to Code P0171 Jeep Garage Jeep Forum

P0171 System to Lean Bank 1

Code P0171

Mar 11, 2016 | Cars & Trucks

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Engine light on


P0171 ; Fuel Trim System Lean (Bank 1)
P0174; Fuel Trim too Lean (Bank 2)
fuel trim is system to modify injector pulse if system go lean it will go rich when the system is too much lean and is max.rich it code
look for 02 sensor bank 1 and 2 data
hope it helps

Mar 31, 2014 | 2003 Chevrolet Malibu

2 Answers

2000 navigator system too lean


Too Lean on which Bank of the Motor?

To have a lean O2 Code --you could have a rich fuel
condition & the pcm drove the fuel trim lean

Next you could have a vacuum leak-in the intake or exhaust system

Third you could have a failed O2 Sensor

Front or Upstream Oxygen Sensors get replaced at 100,000 miles

The front sensors are on the exhaust pipe between the motor &
the converter.

Will need a long handled flex head O2 Sensor Wrench

Mar 17, 2014 | 2000 Lincoln LS

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2003 lincoln navigator 4x4 V8 5.4L system adaptive fuel too lean bank 2. Where's bank too


The sensor on bank two is the side with cylinder number 2.
The problem may be low fuel pressure or a vac leak.

Sep 20, 2012 | Cars & Trucks

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I keep getting a p0171 and p0175 codes from the scanner (auto x-ray)(meaning i'm lean in bank 1 and too rich in bank 2). fuel injector cleaner didn't help really help. so should i replace the upstream O2...


p0171, p0175 = system too lean (usually related to MAF Sensor) this means that the Air Flow Sensor is telling the computer that much less air is entering the engine than actually is. but first check for vacuum leaks in hoses and also pcv hose. the maf sensor may just need cleaned. any auto parts store will have maf sensor spray, follow directions on can. or you can use electrical spray also. as for the 02 sensors its possible. check or clean maf sensor first.

Jul 29, 2010 | Chrysler Concorde Cars & Trucks

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I have a 2003 3.0 engine Honda Accord that is giving me trouble codes P2197 P0154 P2254, what do these mean? Thank you.


Here it goes.
P2197 - Front Air Fuel Sensor (O2 sensor) Bank 2 - Sensor 1 Signal stuck lean.

P0154 - Front Air Fuel Sensor (O2 Sensor) Bank 2 - Sensor 1 Heater System Malfunction.

P2254 - Front AIr Fuel Sensor (O2 Sensor) VS Line high voltage.

IF Trouble codes P0134 or P0154 are present diagnose them before code P2254.

The first thing I would do would be check the heater circuit. You will have ground, and 12V+ to the 02 sensor heater line on a cold start. This heats up the oxygen quicker and allows it to operate in the correct amount of time. 9/10 times if there is a heater circuit code it is the oxygen sensor. But 1/10 times it is a blown fuse. So checking the voltage at the sensor is a quick test for P0154.

I would backprobe the signal line when the vehicle is at a full operating temp with a graphing meter (if avail) or use a DVOM. You should see it switch between .1 volts to 1V. It should not continuously move up and down. This indicates the computer is in good fuel control.

Diaginosis the heater circuit first is best because code P2197 can be set from anything that can cause that motor to run lean. (Plugged fuel filter, low fuel pressure/volume, vacume leak).

Hope this gives you a solid path to go on & good luck.

Nov 16, 2009 | 2003 Honda Accord

1 Answer

I have 2004 GMC ENVOY XL the engine light stay on. i do a diagnostic on it the code i get is P1133 HO25/025 INSUFFICIENT SWITCHING SENSOR 1 OR BANK 1 SENSOR 1. also code PO133 02 CIRCUIT SLOW RESPONSE(BANK...


P1133 is a slow 02 sensor or a shorted to ground at the PCM to 02 sensor signal. If the 02 sensor does not cycle fast enought it is called a lazy 02 sensor, the only way to test for this is with a digital volt meter or a scanner. if it will not pulse fast enough it will throw the code so Replace the 02 senor on the driver side bank. Bank one. then clear the codes. The code is thrown do to seveal reasons the 02 sensor could be dirty or it just could be worn out, you could pull it and clean it and try it again or just replace it and be done with it. The cost of a heated 02 sensor is $50.00 at a auto parts store or the dealer might charge a little higher but the cost in savings of fuel is well worth it.

Jun 30, 2009 | 1998 Saturn SC

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