Skip to main content
Motor Vehicle Maintenance & Repair

Return to Question

edited body
Source Link
dlu
dlu
  • 14.5k
  • 8
  • 51
  • 82

I have a 2002 Toyota Corolla (engine 1ZZ1ZZ-FE engine) and I am trying to understand the fuel trim values I am getting in real driving conditions from my scan tool. I have P0171 code (lean condition) that comes on and off. I posted earlier about this, but I fixed a lot of things in the meantime. I was hoping someone could take a look at the screenshot attached and tell me if these values look off or not.

  • STFT mostly remain between -5% - 5% which I think is great.
  • LTFT, however, ranges from 12 to 25% These values look high to me, is that right?

I appreciate any insights!

ST and LT fuel trims

I have a 2002 Toyota Corolla (engine 1ZZ-FE) and I am trying to understand the fuel trim values I am getting in real driving conditions from my scan tool. I have P0171 code (lean condition) that comes on and off. I posted earlier about this, but I fixed a lot of things in the meantime. I was hoping someone could take a look at the screenshot attached and tell me if these values look off or not.

  • STFT mostly remain between -5% - 5% which I think is great.
  • LTFT, however, ranges from 12 to 25% These values look high to me, is that right?

I appreciate any insights!

ST and LT fuel trims

I have a 2002 Toyota Corolla (1ZZ-FE engine) and I am trying to understand the fuel trim values I am getting in real driving conditions from my scan tool. I have P0171 code (lean condition) that comes on and off. I posted earlier about this, but I fixed a lot of things in the meantime. I was hoping someone could take a look at the screenshot attached and tell me if these values look off or not.

  • STFT mostly remain between -5% - 5% which I think is great.
  • LTFT, however, ranges from 12 to 25% These values look high to me, is that right?

I appreciate any insights!

ST and LT fuel trims

deleted 8 characters in body; edited title
Source Link
dlu
dlu
  • 14.5k
  • 8
  • 51
  • 82

Fuel Trims ReadingTrim Readings

I have a 2002 Toyota Corolla (engine 1zz1ZZ-feFE) and I am trying to understand the Fuel trimsfuel trim values I am getting in real condition driving conditions from my scan tool, because. I have p0171P0171 code (lean condition) that comes on and off. I posted earlier about this, but I fixed a lot of things in the meantime. I was hoping someone could take a look at the screenshot attached and tell me if these values look off or not.

  • STFT mostly remain between -5% - 5% which I think is great.
  • LTFT, however, ranges from 12 to 25% These values look high to me, is that right?

I appreciate any insights!

ST and LT fuel trims

Fuel Trims Reading

I have a 2002 Toyota Corolla (engine 1zz-fe) and I am trying to understand the Fuel trims values I am getting in real condition driving from my scan tool, because I have p0171 code (lean condition) that comes on and off. I posted earlier about this, but I fixed a lot of things in the meantime. I was hoping someone could take a look at the screenshot attached and tell me if these values look off or not.

  • STFT mostly remain between -5% - 5% which I think is great.
  • LTFT, however, ranges from 12 to 25% These values look high to me, is that right?

I appreciate any insights!

ST and LT fuel trims

Fuel Trim Readings

I have a 2002 Toyota Corolla (engine 1ZZ-FE) and I am trying to understand the fuel trim values I am getting in real driving conditions from my scan tool. I have P0171 code (lean condition) that comes on and off. I posted earlier about this, but I fixed a lot of things in the meantime. I was hoping someone could take a look at the screenshot attached and tell me if these values look off or not.

  • STFT mostly remain between -5% - 5% which I think is great.
  • LTFT, however, ranges from 12 to 25% These values look high to me, is that right?

I appreciate any insights!

ST and LT fuel trims

Tweeted twitter.com/StackMechanics/status/809550717014994945
Source Link
Florent
Florent
  • 413
  • 1
  • 6
  • 11

Fuel Trims Reading

I have a 2002 Toyota Corolla (engine 1zz-fe) and I am trying to understand the Fuel trims values I am getting in real condition driving from my scan tool, because I have p0171 code (lean condition) that comes on and off. I posted earlier about this, but I fixed a lot of things in the meantime. I was hoping someone could take a look at the screenshot attached and tell me if these values look off or not.

  • STFT mostly remain between -5% - 5% which I think is great.
  • LTFT, however, ranges from 12 to 25% These values look high to me, is that right?

I appreciate any insights!

ST and LT fuel trims