I installed new 02 sensor cleared code and it came right back, within 2 miles. Replace 02 again...same problem
Do you have the 6-cyl or the 8-cylinder model? The P0135 code is for an upstream O2 sensor. The 6 cylinder has one up near the exhaust manifold and another (downstream) sensor just after the catalytic converter. The 8-cylinder has two upstream sensors, one on either side of the engine near the manifolds, and one by the catalyst. Be sure you located and replaced the correct upstream sensor. If that is not the problem, the issue could be the wiring harness going to the sensor. They run very close to the manifolds and often get damaged. Inspect the wiring leading back from the sensor to the PCM for melted and exposed wiring. IF you find some, you may be able to patch it, but often you must cut out the bad and replace the section with a new connector end. The sensor signal is relatively low voltage and doesn't handle damage wiring well.
SOURCE: Code #P0171 & code #P0174
The most common problem on a Ford with these codes is deteriorated PCV hoses. Check the hoses from the PCV valve to the intake manifold. Pay special attention to the rubber elbows. They often crack on the inside curve and the crack is hard to see.
SOURCE: P0401. P0133, P1131- emmision test
Based on what the tech manuals say I would change the DPFE sensor for the EGR Valve, careful not to tear the special silicone rubber hoses that go to it from the exhaust, as a Ford dealer tech I saw these codes allot, and the DPFE sensor was almost always the issue or the hoses going to it.
SOURCE: O2 sensor problem
I have a 97 gmc sierra .This truck is the same as the chevy ok.Its a 350 5.7 liter 4x4 Z71.I took it to auto zone which was my first mistake.They put it the scanner and said bad O2 sensor.Ok so which one is it i said.They dont know.Well there four (4) O2 sensors in this truck i hope you know that.I had to replace all four of them before i had to take it to a real shop.It seems the fuel pump i replaced a week earlier with an auto zone fuel pump was bad.Ive changed my feul pump 4 times now and have 235000 miles on still running.You need to get your fuel pressure checked.It should be 65 psi to start it and 55 psi to run it.If the pressures are good it could be a different O2 sensor or maybe the mass air flow senor.My last option would be the fuel pressure regulator because it seems to be a waste of time and money.I would get that fuel pressue checked first.Good luck.
SOURCE: 2002 Chevy S10 4.3 02
problem is in replacement of O2 senser try again to put it.
take a help from a link>>
http://www.popularmechanics.com/automotive/how_to/4219927.html?page=2
happy to help u any time.
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SOURCE: I have a 2000 buick lesabre. The fix engine soon
It NEVER was the camshaft sensor! Unless, you've removed the engine lately, which I doubt.
RUN to Advance Auto Parts and buy a can of "SeaFoam" and add to your gas tank per instructions...drive at least 100 miles and the problem should go away...IF it doesn't you'll have to replace the O2 sensors in the exhaust system...Any good mechanic should be able to do this for much less $$ than the dealership DO NOT go to the dealer for repairs!
Good Luck
If your check engine light is on and you have a diagnostic trouble code P0135 stored in the PCM's memory... then you've come to the right place to test and troubleshoot the upstream oxygen sensor.
A code P0135 and P0155 may mean that one or more of the following has happened:
5.Connect the new EVAP vent solenoid harness (3), P/N 22687059, to the EVAP vent solenoid (2), route the harness above the rear ABS harness (4) and connect the EVAP vent solenoid harness (3) to connector C313 (1).
6.Lower the vehicle.
7.Clear the DTC's with the Tech 2 scan tool.
If all of the wires are good you will want to check for any leaks in the evap system.
Hope helps.
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Could it be bank one sensor 2?
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