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I have a 2007 chevy colorado 2.9L RWD. I'm getting a to lean bank (1) code and sometimes a PO131 I just put and aftermarket intake on it. And my gas miles suck I just want to engine light to go away please help

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Posted on Jan 02, 2017

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SOURCE: bank 1 burning to lean check engine light on flunked state emissions

It is a common problem, you will have to change bank 1, o2 sensor as it is covered in burnt oil and fuel telling the computer to run lean.
hope this help

Posted on Jan 17, 2009

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1 Answer

PO131 PO151 PO154


codes PO131 PO151 PO154 okay. code PO131 - o2 sensor circuit low voltage bank 1 sensor 1. code PO151 - o2 sensor circuit low voltage bank 2 sensor 1. code PO154 - o2 sensor circuit no activity detected bank 2 sensor 1

May 19, 2013 | 2000 Nissan Xterra

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I have a 2006 Chevy Colorado..Check engine light on and code 171 came up. Oxygen sensor replaced as was gas cap..Still on..What else needs repairing to fix this??


Trouble Code: P0171

Fuel Trim Too Lean

Possible Causes:


The current cell can be observed using a scan tool.The system will go lean if an injector is not providing enough fuel.A lean condition could be present during high fuel demand due to a fuel pump not pumping enough fuel, plugged fuel filter or a restricted fuel line.Insufficient fuel in the tank or low fuel pressure may cause this DTC to set. Refer to Fuel System Diagnosis .Review the Failure Records with a scan tool. If an intermittent condition is suspected, refer to Intermittent Conditions .

Jan 16, 2013 | 2006 Chevrolet Colorado Extended

1 Answer

Replaced thermostate and coolant sensor now i have code po 171 to lean bank 1


You may have a engine vacuum leak, check for leaks with a bottle of propane gas and a length of rubber tube like fuel line, if you find a leak the engine idle will change. If no leaks are found the O2 sensor may be defective.

Nov 05, 2012 | 2006 Tracrac Chevy Colorado - Standard bed...

1 Answer

P0131 sabb 93 2001 po121 error codes


P0131 - O2 Sensor Circuit Low Voltage Bank 1 Sensor 1 (sensor is before the catalytic converter)

Possible causes- Front Heated Oxygen Sensor Bank 1 harness is open or shorted
- Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Front Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks
P0132 - O2 Sensor Circuit High Voltage Bank 1 Sensor 1
Possible causes- Front Heated Oxygen Sensor Bank 1 harness is open or shorted
- Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Front Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

I am not really sure what is going on here with the same O2 sensor giving these lean and rich codes, if nothing else is apparent and the engine runs well you may have a defective O2 sensor.

Sep 13, 2012 | Saab 9 3 Cars & Trucks

1 Answer

Code p0131 Excessive fuel consumption Intermittent no start (cranks, fires up then dies) Replaced Plugs and wires Fuel filter 02 sensor I don't know where to go from here


CODE PO131 - HO2S 11 BANK 1 SENSOR SENSOR I CIRCUIT LOW INPUT CONDITIONS. POSSIBLE CAUSES LOOK FOR INTAKE LEAKS IN THE EXHAUST SYSTEM, LOOK FOR INTAKE VACUUM LINES LEAKS. FUEL SYSTEM TOO LEAN WEAK FUEL PRESSURE CLOGGED FUEL FILTER,WEAK FUEL PUMP. FAULTY HO2S SENSOR.OR HO2S SENSOR SIGNAL CIRCUIT SHORTED TO SENSOR. HO2S SENSOR DAMAGED CRACKED OR HOLE CLOGGED. PCM HAS FAILED.

Aug 12, 2011 | Chevrolet Malibu Cars & Trucks

1 Answer

I have replaced all 4 ox senors before I replaced intake man. gaskets. It is a 97 chevy W/Truck with a V6 auto, auto trans. 2WD. now service engine soon light came on after about 200 miles, it will go off...


First did you clear all the fault codes after your repairs? The reason I ask is po131 is bank one oxygen sensor, po174 is engine lean from faulty oxygen sensor, and po171 is engine lean condition, possibly from vacuum leak (intake manifold gasket?), pcv valve,etc. To check for vacuum leak at intake, start engine and gently spray starting fluid around intake gasket. If rpm raise slightly while doing this then there is a vacuum leak(stay away from air filter intake and housing though), and the gasket will need to be replaced again.

Jan 09, 2010 | 1997 Chevrolet C1500

1 Answer

Diagnsis codes


replace your bank 1 (driver's side) position 1 (pre-convertor) O2 sensor. It probably will be completely black, the p0134, 134 and 1133 are all for that O2 sensor, the P0171 is for lean fuel trim on bank 1, and the p0300 is for a misfire probably caused by the lean fuel mixture.

Mar 30, 2009 | 2004 Chevrolet Silverado 1500 Crew Cab

1 Answer

2003 chevy silverado codes


Most likely cause is the intake manifold gasket

Feb 03, 2009 | 2003 Chevrolet Silverado 1500

1 Answer

2003 yukon xl 5.3l flexfuel all plugs lean on passenger side


P0131 - Heated Oxygen Sensor (HO2S) Circuit Low Voltage

P1133 - Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1


Bank 1 Sensor 1
P0300 - Engine Misfire Detected

I would check for vacuum leaks, maybe intake or brake booster

Dec 16, 2008 | 2003 GMC Yukon XL

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