I have a 97 Chevy Venture Van with a weakening fuel level sensor.

My 01 Chevy venture just got a new fuel pump put in gas gauge still isn't working proper so had another fuel pump put in same problem. My relay fuse is good fuel pump fuse is good. I have to have my wires checked, make sure my sensor on top of pump connector wires are good. What else can I be looking for?

remove the clip behind remove electrical connector then pull on level senor
caution need to lower antifreeze first before removing
hope it helps

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incorrect firing order for the plug leads
low fuel pressure

check to make sure the security light is not on if it is the van will have spark but no injecter pulse the best way to solve this issue is to have the original igniton key and put it in the igniton in the run position and leave it on for 10 minutes then the light will flash then try to start the van

Change fuel pump relay.And check the fuses

the 2 codes are

P0134 02 Sensor Circuit no activity Detected (bank 1 sensor 1)
first check your fuses check the wiring to the sensor(the sensor is on the exhaust in front of the engine-open the hood and look down) if the fuses and the wiring look good replace the O2 sensor there are 2 types of sensors original equipment(oe) style and universal the oe style has a connector you just plug in, the universal you have to hard wire in

the 2nd code is Mass Air Flow (MAF) Circuit Low Input
check the wireing, make shure theres a good connections
you said that you already replaced this sensor so im going to recomend that you go after the other code first

deal with the oxygen sensor then reset the computer and see what codes come back

sounds like your low in coolant. this will cause an air pocket in engine and cause erratic temp readings/loss of heat check coolant in radiator when cold. and add

drop fuel tank. if guage moves all around its probably the fuel level sensor on fuel pump assembly in the fuel tank. If the guage stay's in one spot its the guage , replace instrument cluster assembly. you can take just the glass off the cluster and move the fuel guage needle and it will work (if stuck) but for how long? The wires to the guage come from the sending unit to the power train control module to the instrument cluster. pray its not in the wiring.

Hi , this can be caused by a bad, tps (trottle position sensor)also can check fuel presure and fuel filter,good luck.......