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Help with RX 300 Check Engine codes

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Old 07-15-12, 11:38 AM
  #1  
Schwinncol
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Default Help with RX 300 Check Engine codes

1999 RX 300 with 175,000 miles. Timing belt and water pump were replaced within 3,000 miles.

Latest codes are:

today:
P1354 Variable Valve Timing
G0300 General Misfire
G0304 Misfire on 4
G0306 Misfire on 6

last week:

P1354 Variable Valve Timing (same code as last 2 times brought in)
P1153 A/F Sensor Circuit Response Malfunction Bank 2 Sensor 2

No money due to the economy to buy a new car or SUV at this time. So I will have to do my best to make my Lexus last a couple more years. Any suggestions?
Old 07-15-12, 12:21 PM
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salimshah
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Who replaced the timing belt? Did your problems start after timing belt change? Was the idller replaced/examined.

The variable timing engine t-belt replacement needs special care.

I would start by opening the belt covers and verify the timing is indeed correct.

Salim
Old 07-16-12, 09:06 PM
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GS4_Fiend
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Make sure timing is not off. If not, the VVT actuator is probably bad. As for the A/F sensor, it's time for new one. It's common on those to go bad.
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