Question about 1997 Chevrolet Tahoe

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I have a 1997 Tahoe that just quit on me. The engine trouble light was on and it was diagnosed as( 2) o2 sensors. Will that eventually cause me to stall out and then just stop running altogether?

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No they will not if the code number was po171 have your fuel pressure checked it should be 55 -60 psi to start your car if it is po171 this is a lean code that a weak fuel pump will cause this code not a o2 :)

Posted on Jul 23, 2009

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An o2 sensor code will very rarly be related to a no start condition.I am a chevy technician, The most common problems on these vehicles is the fuel pump which is located in the fuel tank. Check fuel pressure.

Posted on Jul 23, 2009

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Ignition control module a bad fuel pump could have leaned out truck causing o2 codes before pump quit hit the center of bottom of gas tank if it starts it definatelty needs a pump but have someone turn key while you are under vehicle see if you hear pump

Posted on Jul 23, 2009

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Po136-o137 says change 02 sensor on bank 1 sensor2 I did but engine light is still on 2004 chevy tahoe


code p 0136 refers to heated oxygen sensor (HO2S) 2 bank 1 ---circuit malfunction===causes ---heating inoperative ---wiring---HO2S--- ECM
also refers to oxygen sensor (O2S0 2 bank 1---circuit malfunction===causes --- wiring---O2S ---ecm
it also refers to heated oxygen sensor (HO2S) 2 bank 1 ---no signal===causes ---wiring --- HO2S---
code p 0137 refers to HO2S 2 bank 1 ---low voltage -===causes --exhaust leak---wiring short to ground ---HO2S--- ECM
it also refers to O2S 2 bank 1---low voltage ===causes exhaust leak---wiring short to ground ---O2S ---ECM
to set you up here-- there are 4 oxygen sensors in the system
2 are heated oxygen sensors (HO2S) on in each exhaust manifold or exhaust pipe before the cat converter and
2 oxygen sensors (O2S) -- one in each exhaust pipe after the cat converters
heated oxygen sensors have 4 wires and O2S sensors normally only 2 wires
it is more that possible that you changed the wrong sensors and in the process damaged the delicate wires with the incorrect spanner being used

Jul 25, 2016 | 2004 Chevrolet Tahoe

1 Answer

Upstream heated O2 sensor heater fault


check the fuses if the fuse blew the heated side of the sensor will not work and still kick the code also a v-6 has 2 upstream o2 sensors

Oct 01, 2012 | 1997 Mercury Villager

2 Answers

Hi there i have 1997 Avalon V6 . the check engine light up # 138 and 401 so can you tell me the name of that two please thnks


Trouble codes are normaly 4 digits with a "P" or "B" before it. I am gonna assume that you meant P0138 and P0401:
P0138 is Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 2)
P0401 is Exhaust Gas Recirculation Flow Insufficient Detected

A code P0138 may mean that one or more of the following has happened:
  • Faulty O2 sensor
  • Short to battery voltage in O2 sensor signal circuit
  • High fuel pressure (not as likely)
Possible Solutions Here are some potential solutions:
  • Replace O2 sensor
  • Repair short to battery voltage in o2 sensor signal circuit
for info on the P0401:
http://www.obd-codes.com/p0401

Jul 10, 2011 | 1997 Toyota Avalon

3 Answers

Reccieved P0141, P0147, P0340 as emission diagnostic trouble codes. What do these mean?


P0141....O2 Sensor Heater Circuit (Bank 1 Sensor 2)

P0142....O2 Sensor Circuit Malfunction (Bank 1 Sensor 3)

P0143....O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3)

P0144....O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)

P0145....O2 Sensor Circuit Slow Response (Bank 1 Sensor 3)

P0146....O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3)

P0147....O2 Sensor Heater Circuit (Bank 1 Sensor 3)

P0340....Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor)

Sep 20, 2010 | 1997 GMC Sierra

1 Answer

I have a 97 2 door tahoe. I have trouble starting it. It turns over but wont start right away. It takes about 8-10 seconds of cranking to get it to start. It will start right away if you push the gas down...


o2 is a sensor. You could try replacing the correct one (up to 4 o2 sensors are possible any given vehicle). If check engine light is still on, have the codes cleared, have scan performed again to get the fault codes for possibly the specific o2 sensor. Hope this is helpful.

Apr 26, 2010 | 1997 Chevrolet Tahoe

1 Answer

O2 sensors failing


Your O2 sensor has been running for a long long time. OBD 2 checks both O2 sensors *(pre and post catalyst) to confirm it is just a bad sensor and not an out of range sensor condition or catalyst problem.

If your exhaust system was plugged you would hear it as a loud hissing noise of exhaust escaping any way it could before the plug. You would also notice nothing coming out of the back of the exhaust system. Both easy to rule out.

Replace the appropiate O2 sensor, reset your computer, and drive!

Good luck and be careful!

Dec 11, 2009 | 1999 Chevrolet Tahoe

1 Answer

1997 Hyundai Excel 1.5l, check engine light comes on and the idle is up and down at anytime. umm also bunnyhops sometimes. could this be the idle sensor or throttle sensor or something else?? thanks


Did the 'Check Engine' Light come ON? Whenever the 'CHECK ENGINE' light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on.
You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE and perhaps eventually fix the problem.

Oct 19, 2009 | 1994 Hyundai Excel

1 Answer

LOTS OF SOOT ON THE PLUGS OF A HYUNDIA ELANTRA 2.0 ENGINE


Many possible causes for this. Do you have a "Check Engine" light? Whenever the 'CHECK ENGINE' light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on.
You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE the problem and perhaps eventually fix the problem.
Soot/Carbon buildup on plugs can be caused by many things, like leaky intake valve seals, excessive crankcase emissions being sent back into the intake air hose, leaky fuel injectors causing an excessively "RICH' fuel mixture, excessive fuel pressure from the fuel pump, faulty fuel pressure regulator, worn/faulty PCV, a faulty O2 sensor (upstream) or even a defective ECU.

Sep 23, 2009 | 2004 Hyundai Elantra

1 Answer

97 chev tahoe service engine light is on and it wont start


P0300 is random multiple misfire. If its been more then 3years since the last tune-up, do one. Usually it is caused by debris inside the distributor cap but could also be plugs wires, fuel and air filter.

Apr 28, 2009 | 1997 Chevrolet Tahoe

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