2004 gto ls1 motor is running rich and dtc code is P0131
2004 gto ls1 5.7L motor is running rich (strong gas smell out of tail pipe and poor throttle response) and dtc code is P0131 which is low voltage bank one sensor one oxygen sensor. I switched front o2 sensors front driver to passenger sides and code did not change which would appear to indicate sensors are okay but bank one wiring problem. I tested both ground wires on both sides (both driver and passenger sides) and they appear to be okay. White wire on both o2 sensors indicated no voltage and blue wire on both o2 sensors only indicated 1 volt. I was told that blue wires should show 12 volts and white wires should show 5 volts. What next????? Do I need to get an analyzer such as Auto Tap Pro which will show graph of o2 sensors on computer screen??? What do you recommend. Thanks, Robert
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Re: 2004 gto ls1 motor is running rich and dtc code is...
That would be your best bet it is very hard to diagnose a injected v8 with out the right equipment but speaking from experience ( due to the fact we in Australia built these cars) the oxy sensors cause all sorts of problems and swapping them over does't necercarly prove much
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How long since a tune-up? Are there any applicable trouble codes? Use a gage and check proper fuel pressure? See if system is running rich or lean, of course it sounds like it is running rich.
With idle issues, clean throttle body and idle air system.
I don't know your year--make--model?
There are some safeguards which diagnose rich fuel conditions. If you have a hybrid which has a start-stop feature, this may be a reason for the smell.
Have someone check underneath the car for fuel line leaks just in case. If the system is running rich, a warning will appear. Sometimes old gas will make the exhaust smell stronger and if you used the E85 there will be more odor.
P1361 HONDA - Top Dead Center Sensor 1 Intermittent Interruption Possible causes- Top Dead Center Sensor 1 harness open or shorted - Top Dead Center Sensor 1 circuit poor electrical connection - Faulty Top Dead Center Sensor 1P0113 HONDA - Intake Air Temperature Sensor Circuit High Voltage
Possible causes- Dirty air filter - Intake air temperature (IAT) sensor harness is open or shorted - Intake air temperature (IAT) sensor electrical circuit poor connection - Faulty intake air temperature sensor
Take the air cleaner off and open the throttle (have someone hold the gas pedal to the floor) and look down into the intake manifold, if you see gasoline, the Fuel Pressure Regulator may be leaking sometimes there are plastic fuel lines inside that can leak also. When either of these leak, the engine should run REAL BAD/RICH. Black smoke coming from tail pipe.
Symptoms are rough running, stalling, poor gas mileage, and especially a strong smell of rotten eggs (sulfuric acid). The main cause is old age, but poor/cheap/contaminated fuel can also be a contributing factor.
well first the white smoke indicateds water in fuel system. if you have a strong fuel smell that would indicated that your getting way too much fuel. there are several reasons for this. it could be that the fuel pressure regulater is malfunctiong. the throttle position sensor is bad. it could also be a timing issue.