need help with error codes.
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Junior Member
Joined: Jul 2002
Posts: 97
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From: CA
Car: 02 Z06
Engine: LS6
Transmission: MN12
need help with error codes.
when i checked my check engine light out today, it gave me error code 34 which is "34. Low voltage (high vacuum) at mass air flow sensor (or MAP sensor)" can anybody tell me what jacked up and how to fix it please?? any help would be greatly appreciated, thanks
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Joined: Jan 2000
Posts: 19,659
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Luvr,
It would help to know what year/engine/fuel system you have, since the codes vary somwhat between the different systems. A '34', for example can be a MAP sensor on a TBI engine or a MAF sensor on a TPI or MPFI engine.
The diagnosis would be slightly different for each type.
It would help to know what year/engine/fuel system you have, since the codes vary somwhat between the different systems. A '34', for example can be a MAP sensor on a TBI engine or a MAF sensor on a TPI or MPFI engine.
The diagnosis would be slightly different for each type.
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Joined: Jan 2000
Posts: 19,659
Likes: 310
Luvr,
Scan again for error codes and make sure it is a '34'. If so, check the BARO sensor mounted to the firewall. Make sure the electrical connector is clean and tight. There is no vacuum line to the sensor on an '82 IIRC, so all you can do is test teh circuit. You can test the sensor with a handheld vacuum pump or manifold vacuum supply in the same manner that you would test a MAP sensor, but I believe the output is scaled differently.
Scan again for error codes and make sure it is a '34'. If so, check the BARO sensor mounted to the firewall. Make sure the electrical connector is clean and tight. There is no vacuum line to the sensor on an '82 IIRC, so all you can do is test teh circuit. You can test the sensor with a handheld vacuum pump or manifold vacuum supply in the same manner that you would test a MAP sensor, but I believe the output is scaled differently.
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