Question about 1999 Isuzu Rodeo

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Obd code 1627 ,1999 4 cylinder isuzu rodeo

I have a problem with this 1627 code,I drive the car and clear the code and the monitors.But once the obd connector is hooked up at the smog shop ,it trips the code and the gas light flashes and the gas gage goes back and forth.

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Hprice is right. when you get this code it's usually because the little "fingers" that slide against the metal potentiometer bar on the fuel guage sensor has gone bad or broken off, or in some cases just pushed away from the slider due to it's natural wiggling.

that sensor is located in the fuel pump and you can't really buy a replacement sensor so instead you get the new fuel pump.

I went to 3 yards for this car and almost all the rodeo's of this year had the fuel tanks removed and the fuel pump / sensor pulled. so you can save a hassle and just buy a new pump.

removal is tricky because you've got bolted to the tank the lines that go up, so you have to be careful about removing them. Plus getting that back into the tank is tricky as it has to be exactly straight up / down then the ring clips it down.

It was a long job but had to be done to get past inspection because the check engine light can fail inspections. even if it has nothing to do with smog.

Posted on Dec 14, 2012

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P1627: [driver "1" input high voltage]...

I believe the PCM was expecting a signal from a sensor (which one I don't know) that should be low voltage and instead was high voltage and therefore triggered a DTC for that sensor...I will guess a bad O2 sensor...

code may also be cleared by disconnecting battery negative wire for 30 seconds...remember to reset your clock and radio settings...

sorry that is all I can find...please rate me solved

Posted on Jun 27, 2008

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Fuel level sending device gone bad... tank removal is neccesary.

Posted on Jul 14, 2008

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2000 Isuzu Rodeo, 3.2, 112,000 miles, Service Engine Soon light is on, won't pass inspection till I get it cleared off. Hooked up a scan tool the only code is P1340 and it scan tool says it's a...


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cant do it here to big

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99 rodeo check engine light is on.


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2 Answers

Obd code 1627 ,1999 4 cylinder isuzu rodeo


If P1627 is set when there is a problem with the fuel level sending unit, 100% sure on this problem, replace the fuel level sender in the gas tank, about 2.5 hours, very straight forward job

Jun 02, 2009 | 1999 Isuzu Rodeo

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