DTC Front 2 Oxygen Sensors- help please.

AtlanticBlue99 · July 20th, 2006, 10:29 AM

P0135 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) &
P0155 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

were thrown in my car this morning. The sensors ar eplugged into the bungs on the collector pipe of my long tubes, and have not thrown a code sense installation last winter. I got on it hard and rode it to redline at WOT for 2 gears on my way to the dentist this morning. I cleared the codes with my xcal 2, but in case they come back- any suggestions?

I have the oxygen sensor extender harness from jegs. It has a high-temp coating for the wires in a jacket similar to that of the EGR pipe.

I have bosch oxygen sensors for the front.

They are a screw in style and we used tape on the threads to ensure tight fit.

What would throw these two codes and no others? 2 O2 sensors don't go out at the same time do they?

AtlanticBlue99 · July 21st, 2006, 09:10 AM

Bump, Both codes came back after starting the car 2x. Any help appreciated.

AtlanticBlue99 · July 22nd, 2006, 10:55 PM

Here is what I found:

Code:

HEATED OXYGEN SENSOR (HO2S) MONITOR - HO2S SIGNAL CIRCUIT MALFUNCTION
Diagnostic Trouble Code Description Possible Causes
P0135 -HO2S Sensor Heater Circuit Malfunction (HO2S-11) During testing, the HO2S heaters are checked for opens/shorts and excessive current draw. The code will set when current draw exceeds a maximum calibrated limit or falls below a minimum calibrated limit and/or an open or short is detected. ·Blown fuse
·Short to VPWR in harness or HO2S
·Water in harness connector
·Open VPWR or GND circuit
·Low battery voltage
·Poor electrical connections from PCM to HO2S sensor
·HO2S heater
·PCM

AtlanticBlue99 · July 22nd, 2006, 11:19 PM

Found the fix. I was unplugging and messing with the oxygen sensors when I noticed that the plastic plug from the sensor to the extender harness on both sides had melted to the long tubes and shorted the wires. I guess I need new front O2 sensors and extender harness now.

mdvaldosta · July 22nd, 2006, 11:37 PM

Glad we could help

AtlanticBlue99 · July 22nd, 2006, 11:44 PM

Well, I pulled the sensor harness away from the headers and cleared the ecu and started it about 10x and drove it for a half hour and it is fine! I just need to tape up the melted plug area with electrical tape then a high temp tape and I am done! Thanks for the help guys :wink

turp · July 22nd, 2006, 11:50 PM

Originally Posted by AtlanticBlue99

Found the fix. I was unplugging and messing with the oxygen sensors when I noticed that the plastic plug from the sensor to the extender harness on both sides had melted to the long tubes and shorted the wires. I guess I need new front O2 sensors and extender harness now.

Dumbass!

AtlanticBlue99 · July 23rd, 2006, 12:02 AM

Originally Posted by turp

Originally Posted by AtlanticBlue99

Found the fix. I was unplugging and messing with the oxygen sensors when I noticed that the plastic plug from the sensor to the extender harness on both sides had melted to the long tubes and shorted the wires. I guess I need new front O2 sensors and extender harness now.

Dumbass!

The harness is wrapped in the "EGR wrap stuff" The high temp stuff wraps the O2 extender harness, but it slipped to the plastic plug and melted, making the wire temps too hot. Honest mistake- could happen to anyone

turp · July 23rd, 2006, 12:04 AM

Originally Posted by AtlanticBlue99

Originally Posted by turp

Originally Posted by AtlanticBlue99

Found the fix. I was unplugging and messing with the oxygen sensors when I noticed that the plastic plug from the sensor to the extender harness on both sides had melted to the long tubes and shorted the wires. I guess I need new front O2 sensors and extender harness now.

Dumbass!

The harness is wrapped in the "EGR wrap stuff" The high temp stuff wraps the O2 extender harness, but it slipped to the plastic plug and melted, making the wire temps too hot. Honest mistake- could happen to anyone

Yes but you get extra shithead points for having "the perfect answer" to everyones questions but breaking your own ride!

Ha ha ha ha Fuka

AtlanticBlue99 · July 23rd, 2006, 12:05 AM

Originally Posted by turp

Originally Posted by AtlanticBlue99

Originally Posted by turp

Originally Posted by AtlanticBlue99

Found the fix. I was unplugging and messing with the oxygen sensors when I noticed that the plastic plug from the sensor to the extender harness on both sides had melted to the long tubes and shorted the wires. I guess I need new front O2 sensors and extender harness now.

Dumbass!

The harness is wrapped in the "EGR wrap stuff" The high temp stuff wraps the O2 extender harness, but it slipped to the plastic plug and melted, making the wire temps too hot. Honest mistake- could happen to anyone

Yes but you get extra shithead points for having "the perfect answer" to everyones questions but breaking your own ride! Ha ha ha ha Fuka

Haha, I have the perfect answer because I broke my ride searching for my own answer to the same question a couple months ago!

turp · July 23rd, 2006, 12:06 AM

Which leads me to my previous statement... Dumbass!

July 20th, 2006, 10:29 AM	#1
AtlanticBlue99 I Post Entirely Way Too Much 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: University of Georgia Posts: 8,854 Blog Entries: 1 iTrader: 0 reviews	DTC Front 2 Oxygen Sensors- help please. P0135 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) & P0155 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1) were thrown in my car this morning. The sensors ar eplugged into the bungs on the collector pipe of my long tubes, and have not thrown a code sense installation last winter. I got on it hard and rode it to redline at WOT for 2 gears on my way to the dentist this morning. I cleared the codes with my xcal 2, but in case they come back- any suggestions? I have the oxygen sensor extender harness from jegs. It has a high-temp coating for the wires in a jacket similar to that of the EGR pipe. I have bosch oxygen sensors for the front. They are a screw in style and we used tape on the threads to ensure tight fit. What would throw these two codes and no others? 2 O2 sensors don't go out at the same time do they? __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

July 21st, 2006, 09:10 AM	#2
AtlanticBlue99 I Post Entirely Way Too Much 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: University of Georgia Posts: 8,854 Blog Entries: 1 iTrader: 0 reviews	Bump, Both codes came back after starting the car 2x. Any help appreciated. __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

July 22nd, 2006, 11:19 PM	#4
AtlanticBlue99 I Post Entirely Way Too Much 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: University of Georgia Posts: 8,854 Blog Entries: 1 iTrader: 0 reviews	Found the fix. I was unplugging and messing with the oxygen sensors when I noticed that the plastic plug from the sensor to the extender harness on both sides had melted to the long tubes and shorted the wires. I guess I need new front O2 sensors and extender harness now. __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

July 22nd, 2006, 11:44 PM	#6
AtlanticBlue99 I Post Entirely Way Too Much 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: University of Georgia Posts: 8,854 Blog Entries: 1 iTrader: 0 reviews	Well, I pulled the sensor harness away from the headers and cleared the ecu and started it about 10x and drove it for a half hour and it is fine! I just need to tape up the melted plug area with electrical tape then a high temp tape and I am done! Thanks for the help guys :wink __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

July 23rd, 2006, 12:06 AM	#11
turp My Stallion is Bigger! 1989 Eddie Bauer Bronco 3 feet... Join Date: Aug 2005 Location: VA Beach Posts: 3,012 iTrader: 0 reviews	Which leads me to my previous statement... Dumbass! __________________

July 22nd, 2006, 11:37 PM	#5
mdvaldosta MM Fanatic 2002 Mustang GT 11.47@120.58 Join Date: Aug 2005 Location: Valdosta, GA Posts: 3,940 iTrader: 0 reviews	Glad we could help

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