O2 sensor codes continue - P013A, P0141, P0054, P0138

[Spendit]

GMC 2014, 5.3L, 103K miles - truck set code for bank 1, sensor 2 (downstream), the replacement sensor works after clearing code but continues to return code for HO2S heater performance. Code comes up with each key on cycle, if I clear at idle the code returns after short drive. Once I clear code again I can drive for hours without code however, various heater commands don't change (%, mA) and both low voltage test and open status test "malfunction". Could the new sensor be bad out of the box or does the module not like this manufacture type (NTK 21075), everyone was out of DENSO?

 

Anyone have similar situation and solution?

[asilverblazer]

On 5/1/2023 at 6:33 AM, Spendit said:

however, various heater commands don't change (%, mA) and both low voltage test and open status test "malfunction". Could the new sensor be bad out of the box

Sure could, looks like your diagnosis confirms it.

[rlcole321]

just try swapping Bank 2 sensor 2 with bank 1 sensor 2 and see if the code follows the O2 sensor or stays with the B1S2, which could mean a bad Cat.

[Spendit]

Ive replaced with 2nd new sensor - this one a GM OE part, did the heater relearn and still permanent codes. I can clear them and drive but immediately return at next key cycle. Leading me to believe there is a broken wire somewhere, as the voltage does not change like B2S2.

 

I believe the white wires are the heater circuit - anyone know pin out for these O2's?

 

Both CAT temps are same through drive cycle, so I think its fine.....