H4M24UK

Hi All,

I am new to forums hopefully I am posting in the right section.

I have researched everywhere on the location of the O2 sensor Bank 1 Sensor 1 P0135 Error code. I seem to just be finding the Civic SI (American sedan version) which is different to the European hatchback version.

I have a 1.4 petrol engine and can't seem to find it. Anyone had the same issue?

BrotatoChip

Not quite. You got the generation correct but posted in the DIY section, will be moved to the mechanical issues sub forum.

You're trying to find out where this sensor is or what to do about it? That's for the primary O2 sensor heater circuit. The primary O2 sensor is on the exhaust before the catalytic converter. The majority of us are from North America, we didn't get a 1.4L engine. Below is a link to a 2006 Civic service manual page for P0135 troubleshooting. This is for the North American Civic but I would think it will be similar.

H4M24UK

I'm trying to find where it is as the error code popped up. A lot of what I researched are based on the 1.8L where the O2 sensor is on the front so easy to fix.

The one I am trying to look for is the primary one usually found on the exhaust manifold. As far as I know there are two sensors; Upstream and downstream, the problem i have is the Upstream one.

Don't know what the problem is, which is why i want to take a look at it, maybe it just needs a clean or replacement which is an easy job if I can find where it is.

BrotatoChip

You'll have to go look where the cat is on your car. The secondary sensor will be in the middle of the cat, the primary will be somewhere between it and the engine.