2002 estima 2.4l petrol

[Jimrubbers]

Hi, I am trying to get to the bottom of a problem with my estima. 

Car is very jerky when idle and low speed. 

Kind of chugging when idle. 

I have changed the spark plugs and the ignition coils have been tested and seem fine. I have an error code that comes on intermittently P0174

Does this car have a MAF sensor as I cannot locate it. 

Thinking of checking the oxegen sensor next.

Any help greatly appreciated.

 

Kind regards

Steven

[RUToyota]

Be worth looking at the MAF....a duff or failing 02/Oxy sensor would normally throw a MIL/CEL..?

You have 4 on the 2.4.

Follow back from the air box for the MAF.

 

IIRC P0174 = lean mixture.

[Jimrubbers]

I eventually found the maf. Cleaned it and its still the same.

Try the oxygen sensor next?

[Jimrubbers]

What do you mean by mil/cell?

[RUToyota]

 

10 hours ago, Jimrubbers said:

What do you mean by mil/cell?

Malfunction Indicator Light...Check Engine Light...means the same.

[Jimrubbers]

Ah I see. There's only 2 oxygen sensors on my car. Left and right of the cat. You think I could swap them over to see if it fixes my problem and if it does just get a new one?

[RUToyota]

You sure.?...I always thought there were 4 on the 2.4...I know I've only got 2 on my V6.

..But...an O2/Oxy sensor issue would normally illuminate your check engine light and provide a code.?..and tell you which sensor is the problem.

If you replace then don't buy cheap...go Denso preferably...cheap ones don't usually last long.

[Jimrubbers]

Getting fault code p0135 bank 1 sensor 1 now. 

[Jimrubbers]

No I remember when I replaced the left side 2 years ago. My car is rare that it only has 2 sensors. Replaced with a denso 2 years ago. Bank 1 sensor 1 is the right this time. I knew the second sensor would go eventually as they are original to when the car was made. Going to swap them over in hope it takes the jerking away until I receive the new sensor. 

[RUToyota]

OK...good luck.

[Jimrubbers]

Hi, does anyone have any values for maf sensor readings or oxygen sensor readings. Maybe a service manual of what I am supposed to be seeing. 

Ive cleaned the maf and changed the oxygen sensor. Car has went from rough idle with the old sensor to loss of acceleration and car rattle at 60mph.

Going to put the old sensor back in and see if its maybe a duff denso I've been sold. 

[Jimrubbers]

On 9/11/2021 at 11:41 AM, RUToyota said:

OK...good luck.

Change over the old one and the car gets up to speed fine. Do you think theyve sold me a duff denso sensor?

[RUToyota]

couldn't possibly say..though it's unusual for Denso stuff to be bad.