P0135

Anyone know the best deal for the corresponding O2 sensor? And is this the one needed :
Denso 234-9001 Air Fuel Ratio Sensor

$135 Denso 234-9001 Upstream Air Fuel Ratio Oxygen Sensor with 10.6” 4-Wire Harness, for Auto Trans Equipped Vehicles

https://www.amazon.com/dp/B000C5WD2Q/ref=cm_sw_r_cp_apa_i_K2XtEb3KK9RRP

 

P0135 is B1S1 a/f sensor heater malfunction.
234-9001 is the correct a/f sensor for upstream of catalytic converter 2003 2.7L.
Do not look for the best deal on an air fuel sensor.
Denso is OEM and it's available from Denso products online. https://www.densoproducts.com/Denso-Automotive-Products-l1351.aspx
There is a small chance that the fuse for the a/f heating circuit is blown, check the fuses in engine compartment.
https://www.densoproducts.com/product.aspx?zpid=18790

 

Same product ordered on Amazon, hopefully it is legit and I don't get corona virus installing it.

 

If it's counterfeit the gasket won't come with it. Genuine OE includes gasket.

 

Since Napa started selling Denso sensors they are my go to.

 

Old one out..easier than changing a battery

 

How does it smell ?

 

No smell...i was worried about a headgasket leak with the gray/white foul look but oil isn't milky, no loss of fluids and no overheating problems.

These must be the original sensor bc I bought the truck around 90k miles and it still had the toyota factory sensor until today.

 

170k miles now

 

Never seen an A/F sensor light grey like that. Only tan to dark brown. How's your fuel trim #s? May be running lean which Yoda heads and valves don't like.

 

I have never observed those values, will have to check it.