Toby Unna
08-27-2010, 05:25 AM
Hi all, new Yaris owner - it's a 1.0 on a W-plate.
The engine light came on soon after buying. Plugged the laptop into the OBD port and it says code p0172, mixture too rich. Car runs fine when cold, but after a few minutes' running and from then onwards it stutters/hesitates badly if you push the throttle hard, then picks up after a second and goes ok, though it does feel quite flat (even for a 1-litre!)
Cleared fault codes and turned the engine light off, and it's stayed off for 100 or so miles, but the car is still running poorly.
I removed the AFM and cleaned the hot wire, to no avail.
I've searched around and read that stuttering is a common Yaris issue, but wondered if anyone has any pointers before I start replacing bits hat could make the mixture rich - AFM, coolant/air temp senders, O2 senders?
Maybe worth mentioning that the average MPG readout on the trip computer seems pretty good - ~50mph at a 60mph cruise
Thanks!
The engine light came on soon after buying. Plugged the laptop into the OBD port and it says code p0172, mixture too rich. Car runs fine when cold, but after a few minutes' running and from then onwards it stutters/hesitates badly if you push the throttle hard, then picks up after a second and goes ok, though it does feel quite flat (even for a 1-litre!)
Cleared fault codes and turned the engine light off, and it's stayed off for 100 or so miles, but the car is still running poorly.
I removed the AFM and cleaned the hot wire, to no avail.
I've searched around and read that stuttering is a common Yaris issue, but wondered if anyone has any pointers before I start replacing bits hat could make the mixture rich - AFM, coolant/air temp senders, O2 senders?
Maybe worth mentioning that the average MPG readout on the trip computer seems pretty good - ~50mph at a 60mph cruise
Thanks!