HOW DO YOU FIX CODE 55(KNOCK SIGNAL CIRCUIT RH BANK)

  • Tiny
  • rod j
  • 1993 Lexus ES 300
  • 128,000 miles

I change the knock sensors, throttle body, throttle position sensor, and the ecm. I had the negative battery cable disconnected and I pulled the efi fuse when I did all the work. The check engine light still comes on and goes off with the code 55 appearing.

Tuesday, September 27th, 2011 AT 8:03 PM

3 Answers

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

Wow, you replaced a lot of parts. In most cases I have seen, the connectors on the sensors are what fails. The end kit is about 30.
You really should have spent the money for a real diag from a shop. It would have prevented needless parts replacement.

Take a look at the chart I sent you for the code.

Roy

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Tuesday, September 27th, 2011 AT 8:10 PM
  • Tiny
  • rod j
  • Member

Thanks a lot, I'll definitely look for that kit.
Rod J

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Tuesday, September 27th, 2011 AT 8:17 PM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

Good luck

Roy

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Tuesday, September 27th, 2011 AT 8:19 PM

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