1999 Lexus RX 300 Logo

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Angus Steele Posted on Nov 07, 2016
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This a picture of the freeze frame for my 99 lexus Rx 300. I would like to know what it means and are these normal parameters?

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old marine

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  • Lexus Master 2,426 Answers
  • Posted on Nov 08, 2016
old marine
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The P0325 DTC in the picture says that the ECM has detected a circuit malfunction in the knock sensor for bank 1. As all the numbers in the freeze frame look good, this is probably a bad knock sensor or wiring associated with the knock sensor. The ECM uses signals from the knock sensor to control spark timing. Most knock sensors are buried under the intake manifold, so this will take some work to replace. It's not a critical issue, but could affect fuel economy and long term wear on engine components.

montehammons

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  • Lexus Master 5,531 Answers
  • Posted on Nov 07, 2016
montehammons
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Yes, looks normal, and good. Calculated load is not much meaning, as it changes constantly. ECT of, oh that is centigrade, not sure how that translates to Fahrenheit, but it may be low from not running long...
Your fuel trims (both short term and long term-STFT, LTFT) are very good-showing that fuel is not being added or subtracted by the computer to maintain correct air/fuel ratio. Fuel trim numbers should be close to zero. It is when fuel trim changes by double digits-either positive or negative-that there is an indicated problem. For example, say you had a vacuum hose leak- sucking in extra air to the engine- then you could see STFT number go positive by double digits-meaning the computer senses a lean condition and is adding fuel to compensate. But your fuel trims show the air/fuel ratio must be correct-no change in fuel trims-the positive 2.3 in LTFT is negligible- not a problem.

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5 Related Answers

Anonymous

  • 163 Answers
  • Posted on May 06, 2009

SOURCE: Lexus ES 300

Unscrew the gas cap, wait 30 sec and screw it back on making 3 clicks/cracks. Should be ok in a day or two.

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mx5turbo92

mx5turbo92

  • 545 Answers
  • Posted on Jun 05, 2009

SOURCE: What is the cost of a 90000 mile service for a lexus RX 300?

$700

timing belt
idler pulley
water pump
timing belt tensioner
valve cam gasket
coolant flush
spark plug
oil change
pcv valve
tranny oil change
differential fluid cahnge
drive belt
upper/lower radiator hose
brake system flush
air filter

good luck,i hope this help pls dont forget to rate me thanks

roniecon

Ronny Bennett Sr.

  • 6988 Answers
  • Posted on Jul 04, 2009

SOURCE: 1999 RX 300 Lexus Blower Motor

blower motor bearings going out ,,,replace motor

Anonymous

  • 81 Answers
  • Posted on Oct 04, 2009

SOURCE: HEATER NOT WORKING IN 2001 LEXUS RX 300

you most likely have a bad airmix servo. this happens alot on these. they are expensive to replace too.

Anonymous

  • 3 Answers
  • Posted on Dec 31, 2009

SOURCE: 99 lexus es 300 chk engine and trac lock lite on

I had check engine light and TRAC OFF. OBD-II MIL code was P1133 which is Air Fuel Ratio Sensor Response Malfunction and scanned by AutoZone. After disconnecting the battery for 10-15 minutes, the lights went off. I cleaned the gas cap and tightened it firmly. For the last 400 miles, the lights have not come back. When scanning using Snap-on one, no code was detected. I think gas cap was the reason for the lights.

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I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589

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