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Old 02-09-2015, 10:50 AM #1
Ahlem Ahlem is offline
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Code 71 EGR fault.
From my searching, California vehicles show this fault code. It's a 1993 3.0 automatic. I did pull off all the vacuum hoses during an injector repair project and hopefully put them back on correctly but only have an 80% confidence level. The larger hoses are pretty straight forward. The smaller ones that go on in groups of 3, especially at the lower one are suspect.
There is a vacuum thermo switch on the back of the motor that is in line from the charcoal canister to the throttle body that I broke the tips off of. I put in a similar part from a 4 cylinder car. I will be adjusting the TPS this evening.
Anyone have experience with the EGR code?
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Old 02-09-2015, 11:02 AM #2
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The vacuum thermo switch, i replaced it w/ a new one trying to troubleshoot a cold start issue and broke the new one in like 10 seconds flat, i shoved a golf tee in both vacuum line ends and i get no code. FYI.
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Code 71 EGR fault.-0900c1528004d616-gif  Code 71 EGR fault.-maf966a-vacuum-lines-detail-jpg  Code 71 EGR fault.-3vze-vacuumhose-diagram-gif 
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Old 02-10-2015, 09:13 AM #3
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I pulled the battery terminal to reset the code about 25 miles ago and it hasn't come back on. Could be that it was just a hiccup after the vehicle sat for a good part of the last year or so. I will still adjust the TPS to fix other issues that may also have triggered this issue.
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Old 02-10-2015, 09:25 AM #4
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Here is the vacuum thermo valve thing I pulled off the 4 cylinder Toyota car.
It has the same thread as the original. The price was right at under $5.00 so I will try it.
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