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What does trouble code 33 mean on a 1993 chevy c1500 5.7

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: trouble shoot 1993 chevy surburban engine

Need more information.

Posted on Jul 27, 2009

Molson02536
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SOURCE: I just did a code scan on my 1992 Chevy Cavalier

DTC - 32 EGR system failure
DTC - 33 MAP sensor circuit error (signal high indicating low vacuum)

The EGR failure is causing the DTC 33 code to show up. Check the vacuum lines to the EGR valve.

Good luck and keep me posted

Posted on Nov 19, 2009

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SOURCE: need to know what codes 12 and 33 mean,thanks

Code 12 is just a code telling you that you are in the diagnostic mode and it is working. Code 33 is a mass air flow error code. The computer is detecting mor air going into the engine then required at the detected rpm for more than 5 seconds. Could be caused by a faulty connection(wiring harness,ect) to a bad ECM(electronic control module) or MAF(mass air flow) sensor. Also the TPS(throttle position sensor) could be out of adjustment.

Posted on Dec 29, 2009

  • 1915 Answers

SOURCE: What do trouble codes 67,81, and 82 mean for a

67 a/c pressure sensor circuit or a/c clutch circuit failure

81 brake input circuit fault
82 ignition control (IC) 3X signal error

Posted on Dec 23, 2010

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SOURCE: What does trouble code 33

TROUBLE CODE 33 - AN OPEN OR SHORTED CONDITION DETECTED IN THE AC CLUTCH RELAY CIRCUIT.

Posted on Jul 26, 2011

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4_24_2012_9_25_20_pm.jpeg

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I have a 1993 Chevy Silverado 1500. trouble codes 22, 35, & 37. what do they mean?


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1 Answer

Need to know what codes 12 and 33 mean,thanks/93 chevy lumina,auto trans.


Code 12 is just a code telling you that you are in the diagnostic mode and it is working. Code 33 is a mass air flow error code. The computer is detecting mor air going into the engine then required at the detected rpm for more than 5 seconds. Could be caused by a faulty connection(wiring harness,ect) to a bad ECM(electronic control module) or MAF(mass air flow) sensor. Also the TPS(throttle position sensor) could be out of adjustment.

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1 Answer

I just did a code scan on my 1992 Chevy Cavalier RS 6-cylinder and the codes that came back were 32 and 33. What do they mean?


DTC - 32 EGR system failure
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The EGR failure is causing the DTC 33 code to show up. Check the vacuum lines to the EGR valve.

Good luck and keep me posted

Nov 19, 2009 | 1992 Chevrolet Cavalier

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