My 03 Oldsmobile Alero 3.4l got the diagnostic code P0137 O2 sensor low voltage (bank 1
Sensor 2) Please help?
oxygen sensor is located behind the catalytic converter.
Question: I have a 2004 Chevy Impala LS with a 3800 6 cylinder Engine. It has 76000 miles on it
and the check engine light was on. My mechanic told me that my radiator was never flushed and
oil was mixing in with the radiator fluid. (Sounds to me like I had a bad head gasket).

The repairs along with a
serpentine belt replacement cost me over $1100 to get repaired. I
started hearing a whining sound and I thought there was a bad bearing on the belt tension guide.
The engine light comes back on two weeks later and it $625 to fix the EGR valve with an oil
change. I asked them to check on the whining noise and the mechanic showed me was whenever
the oil cap is removed, with the engine running, the whining stops. Says he never seen anything
like that in the 20 years he been an ASE mechanic.

Says I need some valve work done and that is going to cost more. After paying $1800 into repairs,
with more to come. Is this common for the 2004 Impala LS or is the mechanic looking to finance
his second vacation home? Any suggestions would be greatly appreciated.

What repairs were done for the first $1100. This sounds like a problem one of my Tech's has
seen. Was there something done with
intake manifold of gaskets?

On Dec 16th An Engine Light error message indicating a Coolant Thermostat was needed.
Replace Anti-Freeze, Intake Manifold Reseal/requiring intake manifold set, lower gasket intake
and nipples. An oil change with Valvoline High Mileage Lube and Filter. Serpentine Belt Oil Drain
plug, and Diagnostic Charge all for $1,034.39On Feb 19th after engine light came on again.I
needed an EGR valve. Fuel System Cleaning and de-carbon. All for $627.88.

OK. Then I have the answer as to why the engine is making that sound, and when removing the
oil cap it stops. Your engine is also burning oil. This is not a valve train problem, DO NOT have
him take the engine apart !. The mechanic that did the intake work messed up. He forgot to put in
the PCV valve, or forgot an O' ring on the PCV valve. This is the reason for your problem. See
this link for location of
3800 PCV Valve.

2002 Chevy Impala 3800 V6.
Repairs: I replaced both heater hose fittings because one of them cracked.  Everything went back
together fine.
I had no problems with the car before I replaced the heater hose fittings.  It actually cracked as I was
pulling into my driveway so I don't think that I overheated the car. After making the repairs and putting it
back together, the car won't start.  I've had the battery checked and it's at 100%.  The lights, windows,
automatic seat, and everything else electrical inside the car work... except the radio.  It doesn't light up
or anything. It doesn't even try to start.  There's no clicking noise like when the battery needs jumped.

With radio not working, i would suggest checking all the
fuses first.
Is the theft / security light on the dash? If so you have a problem in the security system of the car. If not,
you need to have some basic diagnosis done. First, you would need to have the purple wire at the
starter checked for power when trying to start the car. This wire is the starter solenoid wire. If it does
have power, then the starter is bad. If no power, then further diagnosis is needed to find out why it does
not crank. Possible ignition switch, crank relay, wiring problem, etc. None of this would be related to that
coolant fitting.

Chevy Impala Engine Noise- Won't Start
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