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P0171 P0174 P0300 P1133 P1153 After engine replacement

3807 Views 0 Replies 1 Participant Last post by  Emptyspaces
Hi all this one is long, and I'm new so please have mercy.

I bought a 2004 Silverado 1500 4x4 5.3 from a friend who hydrolocked it while mudding and broke a rod. The truck has 133k miles on it and I had the engine swapped with another running 5.3L from a 2004 with 130k miles on it.

New engine has great oil pressure and usually runs like a top, idles smooth and goes like a scalded cat. Seems like at random it starts to run like crap, flashing check engine light, popping sputtering, low idle almost dies etc.

I had more codes than I could shake a stick at so I started poking around and found the 15A fuse for the secondary O2 sensor was blown. I looked around and found where they crushed and ripped the wires on the transmission cross member when they installed the new engine.

I just put a new BOSCH GM Direct Fit O2 sensor in to replace it, and replaced the 15 amp fuse and cleared the codes, and it ran good for a few miles then started running like crap again.

Before installing the new O2 sensor and clearing the codes I had:

P0138 HO2S Circuit High Voltage Bank 1 Sensor 2
P0141 HO2S Heater Circuit Bank 1 Sensor 2
P0161 HO2S Heater Circuit Bank 2 Sensor 2
P0300 Engine Misfire Detected
P0522 Engine Oil Pressure (EOP) Sensor Circuit Low Voltage [oil pressure gauge was working intermittently but works fine now]
P1133 HO2S Insufficient Switching Bank 1 Sensor 1
P1153 HO2S Insufficient Switching Bank 2 Sensor 1
C0265 EBCM Motor Relay Circuit (ABS pump is bad?)
C0268 Pump Motor Circuit Shorted
U1000 Class 2 Data Link Malfunction

This is all thats come back in just 10 miles or so of driving:

P0171 Fuel Trim System Lean Bank 1
P0174 Fuel Trim System Lean Bank 2
P0300 Engine Misfire Detected
P1133 HO2S Insufficient Switching Bank 1 Sensor 1
P1153 HO2S Insufficient Switching Bank 2 Sensor 1

I'm getting stumped on where to go from here, I was really hoping that the crushed wires would be the real root of the problem. I'm wondering if water got into the computer when he was driving it off road? All the harness connections I have checked (coils, fuel injector rails, O2 sensors etc) are clean and dry. I haven't checked the computer plugs yet.

Any ideas? Thanks in advance
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