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!997 C3500 No power great idle


veprk130

Question

I just recently encountered a problem with my truck:

 

1997 C3500 CrewCab dually 7.4 vortec

 

One day is was running then the next it was not.

 

Engine has a hard start on cold, but when warm it idles evenly at 1000rpm.

Once I push the gas pedal it just bogs down with no power at all.

 

Here are the codes I found:

 

P0131 - O2 Sensor Circuit Low Voltage (bank 1 sensor 1)

P0150 - O2 Sensor Circuit Malfunction (bank 2 sensor 1)

P0151 - O2 Sensor Circuit Low Voltage (bank 2 sensor 1)

P0171 - System Too Lean (bank 1)

P0174 - System Too Lean (bank 2)

 

Any ideas would help. I was thinking replacing the 2 from O2 sensors.

 

Ruben

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