CODES lots of them!!

[kennydlate]

p0134 H02S Circuit Insufficient Activity Bank1 sensor1
p0135 H02S Heater Performance Bank1 sensor1
p0154 H02S Circuit Insufficient Activity Bank2 sensor1
p0155 H02S Heater Performance Bank2 sensor1
p0300 Engine Misfire Detected
p0332 knock sensor (KS) 2 cicuit Low Frequency

Is there any common thing that would cause all of this??
I have a z71 sierra 99 ext cab push button 4x4 5.3l

[dosser]

If I understand that the truck was underwater, get your checkbook out. I know PO134,135,154,155 are O2 sensor problems and they may affect some of the there codes you are getting. Depending where you go, O2 sensors can cost about $75 - $150.

[envoyxuv]

You've got the tech 2, right? i thought i read that in another post......
If you do, which codes are current (failed, MIL requested), and which ones are history (passed this ignition, passed/failed this ignition). And if it has been underwater, i'd be looking at the electrical connections on the oxygen sensors. The knock sensors don't do well with water intrusion. These models particularly set knock sensor codes when the intake valley fills the knock sensor cavity up with water = corrosion = poor connection = trouble code.

[kennydlate]

yes it was on its drivers side water came in the side of the truck. The water was just deep enough to completely cover the underhood fuse panel it did not come in far enough to hit the BCM in the truck....It didnt come high enough to touch the motor. Would that be still high enough to touch the sensors....is there any sensors that are on that side of the truck?.....could it also be a bad ground??

[envoyxuv]

The common ground shared by all 4 oxygen sensors is ground G104 and is located on the left rear of the engine block (left side, attached to one of the transmission-to-engine mounting bolts). In the underhood fuseblock, O2A fuse (15 amp) and O2B fuse (15 amp) supply voltage to all 4 oxygen sensor heaters. Also- if you have the tech 2 at hand, you should see which one of the codes has requested the MIL to turn on. Chasing a history code will get you nowhere fast. You need to go after the code that has set as a current code and turned on the check engine light.