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fault codes p1273 and p1283


mc

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If you have both in the same time, than it's more likely to be one of the last 3 of these (official causes for this fault code):

  • Air fuel ratio (A/F) sensor 1
  • Air fuel ratio (A/F) sensor 1 heater
  • Fuel pressure
  • Fuel injector
  • Intake air leaks

So yes, probably air leak (or low fuel pressure, but check for air-leaks first).

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Thanks for the info. I have cleared the codes for now, will see if it comes back and then check for intake leaks (after the airflow sensor I presume, guess I am looking for split hoses etc?)

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Well the codes come back every second trip or so. It now sounds like I have an exhaust leak which is getting slowly worse.

Trying to stick my head under the car it appears to be forward of the y-pipe, but difficult to tell with the undertray in place. Could this be the problem or just coincidence?

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  • 2 weeks later...

Got the exhaust leak fixed, replaced the triangular gaskets between manifold and cats. Engine check light came back on this morning after staying off for a day. just 1283 this time so I'm hoping the ecu is relearning after running rich for a while...

Edited by mc
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