Knock sensor and anti-lock light

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Feb 19, 2018 | 06:17 PM

Mark Jahrsdoerfer

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Knock sensor and anti-lock light

So I bought a 93 Chevy s10 blazer back in August 2017 and it runs great but the “service engine soon” light is on as well as the the “anti-lock” light. Ran the codes and got a 53, knock sensor. Is there anyway to test which knock sensor is bad. Also if you know anything about the anti-lock light please let me know.

Feb 23, 2018 | 05:40 PM

christine_208

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Can't help with the knock sensor. If you don't have one, you might be able to find a pdf copy of the owners manual that might help with the "anti-lock" light.

Is the anti-lock light for the ABS?

Feb 27, 2018 | 06:33 PM

Mark Jahrsdoerfer

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I really have no idea. I just have to continue to search the internet. Thanks for reaching out.

Feb 27, 2018 | 09:20 PM

Rusty Nuts

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From: waterford, mich.

Welcome to the forum. I don't believe the 93 has any knock sensors. OBD code 53 is a system over-voltage problem. The computer measured a spike of over 17 volts or 19 volts ( depending on which book neither is from GM ) for 2 seconds. It usually indicates an alternator problem. Since it's new to you I'd start by clearing the codes and if the code 53 comes back then start testing the alternator. Keep an eye on the volt gauge for the spike but it may not happen often or for very long.

The anti-lock brake system light on means that the abs has a problem and the wheels will lock up.