Anyone know obd codes?

[BlackZ-HO]

I drive a 2003 chevy Tahoe z71, the codes are p0327 p0420 p1071 p1074 p0322 can anyone help me please

 

[fubar]

p1071 p1074 can anyone help me please

U sure is not P0171 and P0174?

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[Sprayed8]

p0327- Knock sensor circuit low voltage
P0420- catalyst system low efficiency
P1071- ?
P1074- ?
P0322- ?

These are from HP Tuners for a stock 03 tahoe.

The above poster may be right, 1071 and 1074 are not listed but 0171 and 0174 are fuel trim system lean banks 1 and 2. P0322 is not listed either.

 

[ezdaar]

Here is a Full list of OBD Trouble codes

 

[fubar]

Actually my 02 Tahoe has 0171/0174 right now and in the process of getting that fix.

I kno it can't be the o2 sensor caz I have only 85k original miles. I have a guy looking into it but still hasn't figured it out as of yet. Any thoughts/comments are welcome.

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