1999 chevy tahoe. check engine light. needed smog for dmv registration renewal. fault code P1345. what is needed to get it to pass smog check?

Question edited for clarity.
Question moved to model category.

Did you clear the code with a Scan Tool after replacing the valves?

The 1998-2001 Chevrolet Tahoe has a known issue with the air pump check valve which causes illumination of the check engine light. There are no notable symptoms, but the vehicle will not pass state inspection or smog testing. When the valve fails, it sticks closed, and the computer sets the code P1416.Dec 10, 2016

Check Engine Light and Code P1416 on Chevrolet Tahoe

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The DMV will tell you when you renew registration if it is in need of a smog certification. In most states it is every 2 years or bi-annual if you prefer.

http://www.obd-codes.com/trouble_codes/

scroll down to your code and open code. gives symptoms and possible fixes

pass side below front of cylinder haed on block, there wiil be a number with letters. give those numbers to dealer.

Fault code..P1345 Crankshaft Position (CKP)..Camshaft Position..V. Check to see that both are hooked up and working properly.

could be anything but i would check the vacumn hoses first for perished or splitting its a common fault

Make sure your gas cap is tight, at least 5 clicks, sometimes a gas cap that doesn't seal tight will trigger the Check Engine Light. If the light stays on you will need to pull the Trouble Code from the ECM (Computer) using a OBD II scanner.

I had the same problem, then took my car to an expert repair shop who diagnosed the sensors and
found no problem with the car. They notified the DMV who was unaware of the problem, who then told the repair shop (John's Bascom Automotive) that they will adjust their computer system to allow a "two speed idle test". My bill was $95 and I still have to pay for a smog test after driving around for
a couple of days to clear the computer monitors, a fair amount and I gladly paid it.

John advised me that I'd get no satisfaction with Toyota or the DMV. I went to the dealership where I
bought the car and they said that the smog stations don't know what they're doing. They charge
about $100 and work around the P0500 code but it takes them about two hours to do this. I told
them that I should have been notified about the dyno none-compatability by Toyota and that Toyota
should have notified the DMV beforehand. I wonder how many speed sensors are being replaced by
unknowing smog shops around the state. I got Toyota's main customer support phone number and
will call them Monday. I'm going to get my pound of flesh ($95 worth) from the DMV next week also.

traderralph

This code is send (in your case NOT SEND)
by the fuel sending unit.

Does your fuel gauge give incorrect of jumpy reading when it's full?

The quick fix is STOP TOPPING OFF the fuel tank when you are get gas.

Keep topping off will push the fuel tank float off it's sensor limit and eventually short or send OUT OF RANGE reading to the fuel gauge.

Fill your truck up to 3/4 tank full.

Drive it for 2-3 days or about 100 miles.
(this will fill the ready-ness data that DMV want)

If there is NO check engine light ON during the 2-3 days then give the smog test another shot.

DO NOT add fuel unit you complete the smog test.
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The CORRECT method to fix your problem is to drop the gas tank and replace the fuel sending unit.

If you truck has over 140,000 miles on it then I will recommend you the change the WHOLE integrated fuel pump/fuel sending unit and fuel filter at the same time.

Not a solution: This is my problem...
I needed to get my car smogged, but the check engine light was on. Took to to a local smog station that had replaced a sensor for me in the past in order to pass smog. They could not fix it. Put car in dealership garage for repairs and to date, the transmission module sensor (computer) went out and the ignition sensor was out also. The mechanic replaced both and now the code P1702 comes up. What does that code mean? My car still won't pass smog....