Throwing code P0462, researched, but I have a few questions
11-30-2009, 12:35 PM
#1
2003 Nisan Maxima
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Location: timonium, maryland
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Throwing code P0462, researched, but I have a few questions
Alright org, my first real issue with my 2003 Max is as followed. I know its irrelevant but my car is just about to hit 70,000. The code I am throwing is P0462 - Fuel Level Sensor Circuit.
The Haynes repair manual suggests to do the following after removal of the rear seat and the fuel pump/fuel level sending unit access cover:
-Before checking the fuel temperature sensor, check the voltage supply and ground circuits from the PCM. Disconnect the electrical connector from the fuel level sending unit/fuel temperature sensor. Conect a voltmeter to the pink/blue or red/blue (+) and black (-) wire terminals of the harness connector. Turn ignition key on - the voltage should read approximately 5.0 volts. If the voltage is incorrect, check the wiring from the sensor connector to the PCM and from the connector to the engine ground point. If the circuits are good, have the PCM checked at a dealer service department (RIGHHHTTT).
-Using an ohmmeter measure the resistance between the two fuel temperature sensor terminals. With the system at room temperature, sensor resistance should be 2,300-2,700 ohms. A more accurate check may be performed by removing the sensor and suspending the tip of the sensor in a container of water. HEat the water on the stove while you monitor the resistance of the sensor. Compare your measurements to the intake air temerature sensor resistance chart.
My main questions are:
1. If all of the voltage and ohm reading's come out correctly, what is going to have to be replaced to get rid of this code?
2. Do I need to replace the entire fuel level sending unit?
3. Or can I replace just the Fuel Level Sensor Circuit?
4. Also, depending on the parts I may need, where is the best place to pick these up? Here on the org? Or is it better to buy brand new?
I know this may seem somewhat direct in diagnosing the issue. However, I want to find out from other members if they have had this issue and how easy it was to correct the problem. I'd like to know everything I can about this before jumping into it. I also don't want to pay a shop $500+ to do this job when it seems somewhat of an easy challenge.
Thanks all!
The Haynes repair manual suggests to do the following after removal of the rear seat and the fuel pump/fuel level sending unit access cover:
-Before checking the fuel temperature sensor, check the voltage supply and ground circuits from the PCM. Disconnect the electrical connector from the fuel level sending unit/fuel temperature sensor. Conect a voltmeter to the pink/blue or red/blue (+) and black (-) wire terminals of the harness connector. Turn ignition key on - the voltage should read approximately 5.0 volts. If the voltage is incorrect, check the wiring from the sensor connector to the PCM and from the connector to the engine ground point. If the circuits are good, have the PCM checked at a dealer service department (RIGHHHTTT).
-Using an ohmmeter measure the resistance between the two fuel temperature sensor terminals. With the system at room temperature, sensor resistance should be 2,300-2,700 ohms. A more accurate check may be performed by removing the sensor and suspending the tip of the sensor in a container of water. HEat the water on the stove while you monitor the resistance of the sensor. Compare your measurements to the intake air temerature sensor resistance chart.
My main questions are:
1. If all of the voltage and ohm reading's come out correctly, what is going to have to be replaced to get rid of this code?
2. Do I need to replace the entire fuel level sending unit?
3. Or can I replace just the Fuel Level Sensor Circuit?
4. Also, depending on the parts I may need, where is the best place to pick these up? Here on the org? Or is it better to buy brand new?
I know this may seem somewhat direct in diagnosing the issue. However, I want to find out from other members if they have had this issue and how easy it was to correct the problem. I'd like to know everything I can about this before jumping into it. I also don't want to pay a shop $500+ to do this job when it seems somewhat of an easy challenge.
Thanks all!
Last edited by Teaner; 11-30-2009 at 12:42 PM.
11-30-2009, 02:44 PM
#2
If I'm not mistaken I believe it's all part of the fuel sender. More often than not a circuit code for a sensor usually means the sensor's gone bad. At least that's what I've seen 95% of the time anyway, but routine diagnostics don't hurt just to make sure it is what it is. The last time I did a fuel pump on an Altima (2002, 2.5L) I think it was up around $250-$300 at my cost (dealer discount). If you're planning on taking out the fuel pump/sender, definitely change the O-ring because it may swell up. At least if you change the pump you'll have a clean pump filter and won't have to worry bout pump failure in the near future. Just my thoughts, though.
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