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Have replaced ECU but still having issues

Tiny
LARRYYARB
  • MEMBER
  • 1995 LEXUS ES
  • 143 MILES
Lexus Es300, 94, 143k miles. I was having issues with my od light flashing and cel with my car. High rpms and hesitation. Dealer said get another ecu.I recently changed out the ecu for a new one. The cel and od light did not come on, but the rpms would rev up moving at 20 mph. It idles lower but still reving at 3000 rpms when I hit 60. What can I do? Thanks Larry
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Saturday, March 3rd, 2012 AT 10:54 PM

2 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Sounds like the trans is not shifting into the highest gear. Have a trans shop verify and determine the failure.

Roy
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Sunday, March 4th, 2012 AT 4:18 AM
Tiny
LARRYYARB
  • MEMBER
  • 25 POSTS
Tried resetting the ecu did not help. Now the ecu is giving Getting codes: P0500 and
P0720

What needs to be fixed?
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Monday, March 5th, 2012 AT 2:33 PM

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