code p1284

S

sch4400

Member
My post is gone. I can not found that.
anyway...
My service engine soon lamp came on last week code p1284 for during 4 days.
but, just came off on yesterday. I don't know why..
Just driving...and gone.
Is it possible?
also, Is it getting more damage with my car?

the code p1284 is A/F sensor 1 rich shift monitoring.
so, should I fix that? even though came off the lamp?
please, advice...
thank you~
 
P1284:
Trouble diagnosis name: Air fuel ratio (A/F) sensor 1 (Bank 2) rich shift monitoring
Component Description
The A/F sensor is a planar dual-cell limit current sensor. The sensor element of the A/F sensor is the combination of a Nernst concentration cell (sensor cell) with an oxygen-pump cell, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement λ= 1, but also in the lean and rich range. Together with its control electronics, the sensor outputs a clear, continuous signal throughout a wide λ range (0.7 < λ < air).
The exhaust gas components diffuse through the diffusion gap at the electrode of the oxygen pump and Nernst concentration cell, where they are brought to thermodynamic balance.
An electronic circuit controls the pump current through the oxygen-pump cell so that the composition of the exhaust gas in the diffusion gap remains constant at λ = 1. Therefore, the A/F sensor is able to indicate air/fuel ratio by this pumping of current. In addition, a heater is integrated in the sensor to ensure the required operating temperature of 700 - 800°C (1,292 - 1,472°F).
DTC detecting condition:

  • The output voltage computed by ECM from the A/F sensor 1 (Bank 2) signal is shifted to the rich side for a specified period.
Possible cause:

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




check all of that stuff on the bottom and if the light doesnt come on again, you'll be okay
 
actually...the light came on..and I was erased , and came on then just came off.
so I don't know what I have to do.....
 
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