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Smog check tech says 90 van (v6 3/4ton) is automaticallY failed by computer hook up If mil light comes on at any time during test. Obd1 codes present are 12 which merely says power has been disconnected at battery some time in last 50 ignition starts. Code 15 short in speed sensor circuit. And #33 short in ac clutch circuit. The first code has nothing too do with emissions at all and merely informs of a recent open in circuit. How is this a fail? Code #15 the little plastic hear in the tranny that runs the speedometer has

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  • Cars & Trucks Master
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Because they like to get you to spend money. Complaints have come in on new cars (less than 2 yrs old) that fail and the owners are told to go spend hundreds or thousands of dollars on repairs.
The intentions are good, but the way they go about the program is horrible. I agree that some codes shouldn't result in a Fail, but they just give a blanket statement that any code=Fail.
Looks like you need to get those issues resolved before having it tested again.

Posted on May 12, 2017

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Posted on Jan 02, 2017

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saailer
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SOURCE: Manufacturer Specific Code P1171

Change upstreamO2 sensor on bank #1



FixYaWIZ...saailer

Posted on Dec 10, 2009

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How to hook up code reader to 94"astro van


If your fully obd1 compliant, You hook it up to the aldl, usually located along lower side of dash. You could use a jumper wire between terminals A and B, turn key just till dash lites come on, no further, then the mil on the dash starts flashing, you count the flashes to get the code/s, Your looking for two digit codes.
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What might cause codes p0325 , p0304 to turn my check engine light on during smog test on my1998 Nissan Altima 2.4L No kicking No noise except the drive belt which just started after smog test


This is common in the Nissan's could be the cam and crank sensor these go at around 70000 to 120000 should do both at once to be safe. that will fail an emissions test for sure. hope this helps

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1 Answer

95 sl500 check engine light reset and comes back on after it sits over night. any idea?


What code is it throwing ? Some codes are what are called two trip codes ! You clear the codes an start an drive the vehicle ,no check engine light . Park the vehicle over night an bam next time you start an drive the vehicle the check engine light comes back on .

??There are two types of DTC's, 1 trip DTC's and 2

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??A 1 trip DTC is for a condition that requires

immediate attention such as a catalyst damaging

misfire.

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1 Answer

MIL/Check Engine Light will not come on during start up to pass smog 2000 Ford Mustang


There should be a 10amp fuse in the fuse box for the instrument panel that powers the light. The light is grounded by the computer.
Have you checked the fuses in the passenger compartment ?

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1 Answer

How to read diagnostic trouble codes for a dodge avenger. the smog technion failed my smog due to system malfution light obd2 not ready?


Was the light on or did the tech say the system was not ready? They can be two different things.

A light would need to get scanned or a code reader attached to the car may do it. Most auto part stores will hook up a code reader for free and let you know what codes are present.

If the light was not on but it stated system not ready on the smog machine that can be due to the battery being disconnected. Its basically saying that the computer needs to go through drive cycles so it can test the its systems.

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1 Answer

My GMC 2003 Envoy failed smog test because of "the


The person running the test is an idiot. The OBDII test instrument is not capable of determining if there is a warning lamp failure. It is probably guessing based on voltage level, but lamp resistance does normally vary. The test is supposed to be done visually. Take it to someone else, and they will probably be more competent and pass your car.

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1 Answer

My GMC 2003 Envoy failed smog test because of "the


Hello
Does the light ever come on while you are driving the vehicle? It is possible that the vehicle does not trigger the code on the key cycle when vehicle is connected to the OBDII scan tool (a cycle is the time from when a vehicle is started to the time the vehicle is turned off) you should however most of the time be able to check a vehicles trouble code history to see what may be turning the light on
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Chris

Mar 22, 2011 | 2003 GMC Envoy

2 Answers

Failed CA smog test "MIL/Check Engine Light", computer data wiped


No this is not right. If you remove the battery everything resets anyways. If they are talking about relearn procedure, it should only require 50 miles. But if the light is on than either they did something wrong, created another problem, or there was already another one existing. Have the code read and let me know what it is. I'm in Ca too and used to prep european cars for smog, so I do know what I'm looking for. How did the rest do? What were the readings(if possible)?

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1 Answer

Mil/check engine light smog test failed


If you are a DIY'er you can get a OBDII scan tool that connects to your laptop that can tell you the error code and allow you to reset your check engine light.

Check out http://www.fitityourself.netau.net/OBDII.html

Sometimes the check engine light comes on if you did not fit your gas cap tight enough. You need a code reader to find out the error code to help solve your problem.
If it is something simple (like a gas cap) and you do not want to get a code reader to find out what codes (problems) your vehicle computer is saying there is. You can try disconnecting the negative battery lead for 5 minutes. This should reset your check engine light. Drive and see how long it takes before it comes back on - this may help you pass the smog inspection...

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1 Answer

Will my VW Golf fail its mot when the esp light is always on ???????????????? HELP !!!!!!!!!!!!!!!!!!!!!!!!!!


If you asking whether it will fail a Ca. SMOG test with the ESP, ASR, ABS, EPC lit up in your dash? YES! Specially test techs that have a bad day to begin with. Some will be dishonest calling a non related MIL e.g. ASR & ABS as a MIL/Check Engine light and charge you for a second test.

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