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2003 5.3 VORTEC P158 P160 CODE
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JAKE ELLETT
Novice
May 7, 2009, 9:23 PM
Post #1 of 14
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2003 5.3 VORTEC P158 P160 CODE
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2003 CHEVEY Z71B WITH A 5.3 VORTEC 167000 MILES GOT A P158 AND A P160 CODE I AM A DESIEL MECHANIC FOR MAC TRUCKS I WOULD LIKE TO KNOW WHAT THE FUEL PRESSURE IS ON THIS MOTOR AND IF I CAN DO A OHM TEST ON THE OXGEN SENSOR TO SEE IF IT IS BAD I AM TOLD IT ALSO COULD BE FUEL PRESSUR REGULATOR TRUCK RUNS GOOD JUST CHECK ENGINE LIGHT IS ON ALTHRO IT DOES SEEM A LITTLE SLUGGISH AT 75 MPH
(This post was edited by JAKE ELLETT on May 7, 2009, 9:39 PM)
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Hammer Time
Ultimate Carjunky
/ Moderator
May 8, 2009, 1:35 AM
Post #2 of 14
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Re: 2003 5.3 VORTEC P158 P160 CODE
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These codes are for a downstream sensor so they would have no bearing on engine performance. They only monitor Cat performance.
The fuel pressure for this vehicle is VIN Z 335-375 (48-54 psi)
Except VIN Z 385-425 kPa (55-62 psi)
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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JAKE ELLETT
Novice
May 8, 2009, 6:37 PM
Post #3 of 14
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Re: 2003 5.3 VORTEC P158 P160 CODE
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THANK YOU FOR THE INFO I READ THE PAPER WRONG IT SAYS 881 OXYGEN SENSOR DEFECTIVE 882SYSTEM RUNNING RICH OR LEAN 883 ENGINE MISFIRE 884 FUEL PRESSURE VERY HIGH OR LOW FUEL PUMP OR PRESSURE REGULATOR BAD I GUESS I SHOULD TAKE A FUEL PRESSURE TEST READING THEN GO FROM THERE IF YOU KNOW IS IT MORE LIKELY FOR THE PUMP TO GO BAD OR THE REGULATOR I GOT THESE READINGS FROM AUTOZONE ANYWAY THANKS FOR YOUR HELP AND IF I CAN ANSWER ANYTHING FOR YOU ABOUT A DIESEL ENGINE ON A BIG TRUCK FEEL FREE TO CONTACT ME e48jake@gmail.com ONCE AGAIN THANK YOU
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Hammer Time
Ultimate Carjunky
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May 9, 2009, 2:51 AM
Post #4 of 14
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Re: 2003 5.3 VORTEC P158 P160 CODE
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I don't know what that last stuff was that you gave me but those are not OBD2 codes. The first ones were.
We need some specifics on exactly what is happening to your truck and what codes are being stored.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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JAKE ELLETT
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May 9, 2009, 4:54 AM
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Re: 2003 5.3 VORTEC P158 P160 CODE
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OK WILL GO BACK TO AUTO ZONE TODAY AND SEE IF I CAN GET THE CODES AGAIN AND WILL GET BACK AGAIN WITH YOU THE TRUCK RUNS FINE EXCEPT BEING SLUGGISH AT AROUND 75MPH IT SEEMS TO BE STRUGGLING TILL YOU FLOOR IT THEN IT WANTS TO GO AND GO STRONG BUT I WILL GET BACK WITH U IN A COUPLE OF HOURS AND ONCE AGAIN CAN NOT THANK YOU ENOUGH TALK WITH YOU SOON THE ENGINE LIGHT DOES STAY ON WHEN IT FIRST CAME ON IT STAYED ON FOR A DAY THEN WENT OFF THE NEXT MORNING AFTER I STARTED IT UP THE NEXT DAY IT RAN ABOUT 1 HOUR CAME ON BEEN ON EVER SINCE LET YOU KNOW HERE IN A BIT JUST WHAT IS GOING ON THANKS FOR THE REPLY JAKE
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JAKE ELLETT
Novice
May 9, 2009, 7:34 AM
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Re: 2003 5.3 VORTEC P158 P160 CODE
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I GOT THE CODES FROM AUTOZONE AGAIN THEY ARE PO158 AND PO160 CODES ONE IS OXGEN SENSOR ONE IS FUEL PRESSURE REGULATOR OR PUMP WHAT IS THE MOST COMMON FIRST CAN I OHM OUT THE OXGEN SENSOR DOES IT HAVE A CERTAIN OHM READING TO TELL IF THE SENSOR IS BAD OR NOT OR WHAT DO U SUGGEST TO DO FIRST THANKS JAKE
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Hammer Time
Ultimate Carjunky
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May 9, 2009, 7:40 AM
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Re: 2003 5.3 VORTEC P158 P160 CODE
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No, that is not at all what those codes mean. You are getting conflicting codes for that sensor but like I told you in the beginning, that is a downstream sensor and has no bearing whatsoever on engine performance. They are Catalytic Converter monitors only.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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JAKE ELLETT
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May 9, 2009, 8:05 AM
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Re: 2003 5.3 VORTEC P158 P160 CODE
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OK SO WHAT ARE YOU SAYING U THINK IS THE PROBLEM THE CONVERTOR MAY BE PLUGED UP ARE IS THERE SOMETHING ELSE I NEED TO DO
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Hammer Time
Ultimate Carjunky
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May 9, 2009, 9:10 AM
Post #9 of 14
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Re: 2003 5.3 VORTEC P158 P160 CODE
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No, I'm saying the computer isn't seeing any problem at all, just one issue with the Converter monitor but that doesn't effect driveability at all.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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JAKE ELLETT
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May 9, 2009, 9:19 AM
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Re: 2003 5.3 VORTEC P158 P160 CODE
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OK THEN MY NEXT QUESTION WOULD BE HOW DO I FIND OUT WHY THE CHECK ENGINE LIGHT IS ON WHAT DO U SUGGEST I DO THE ENGINE RUN FINE BUT ACCORDING TO TEXAS LAW U CAN NOT HAVE A CHECK ENGINE LIGHT ON TO PASS INSPECTION I APPRECIATE ALL YOUR HELP VERY MUCH AND LIKE I SAID BEFOR IF I CAN EVER HELP YOU WITH A DEISEL ENGINE PLEASE FEEL FREE TO CONTACT ME e48jake@gmail.com thank you and i will wait to see what u suggest
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Hammer Time
Ultimate Carjunky
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May 9, 2009, 9:26 AM
Post #11 of 14
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Re: 2003 5.3 VORTEC P158 P160 CODE
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That's most likely a bad O/2 sensor. I'd take a shot at replacing that. It's the one after the Converter on the passenger side.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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JAKE ELLETT
Novice
May 9, 2009, 11:09 AM
Post #12 of 14
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Re: 2003 5.3 VORTEC P158 P160 CODE
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ok thank you i will try that first like i said if i can help u out with any diesel engine repair feel free to contact me all the sensors on a diesel can be checked with a ohm meter and they all have on board read outs with a light that flashes to give you the codes . very simple compared to automobiles i guess it is what u do all the time also makes it simple but you know something funney you cant even put heated mirrors on a new truck unless you program the computer to let it know they r there modern tec. it gets crazyer by the mintue ok hammer thanks take care will let u know i am in houston texas by the way thanks
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bill_wilcox100
New User
May 28, 2009, 4:34 PM
Post #13 of 14
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Re: 2003 5.3 VORTEC P158 P160 CODE
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I just cleared a P0160 code today. 
As correctly stated above, this is generic O2 sensor related code as follows:
- "P0160 O2 Senor Circuit No Activity Detected (Bank 2 Sensor 2)"
On my vehicle, Bank 2 Sensor 2 refers to the Left Side Back O2 sensor located downstream from the Catalytic Converter. Documentation says that it is used to gauge the performance of the Catalytic Converter only and is simply not used by the Engine Control Unit for controlling the engine at all. The engine is actually controlled by the other O2 sensor which is upstream of the Catalytic Converter and closer to the exhaust manifold.
In my case the O2 sensor connector had come loose from its anchor and was laying on the exhaust pipe. The connector on the O2 sensor side and the connector on the main harness side were both melted. That's what P0160 was trying to tell me.
I changed for a universal O2 sensor ($70 CND) and bought an OEM harness side connector, with pigtail, from the dealer ($40 CND). After installation, clearing out the existing codes with my OBD2 unit and driving a few miles the P0160 code is now cleared!
Hope this helps.
Best of success. 
Bill
Chrysler, Intrepid, 2000, 2.7 L, V6, Automatic, 160,000 Km
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JAKE ELLETT
Novice
May 28, 2009, 6:46 PM
Post #14 of 14
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Re: 2003 5.3 VORTEC P158 P160 CODE
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HEY THERE I CHANGED THE O2 SENSOR ON THE END OF CAT CONVECTOR CODE IS GONE THANKS FOR YOUR HELP EVERY ONE HAVE A GOOD DAY ANYTIME I CAN HELP WITH A DIESEL CONTACT ME BE GLAD TO HELP IN ANYWAY TAKE CARE JAKE
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