I just finished install my intake......but now I see the check engine light on. I inspected the installation and now i see there is a small knick on the mass air flow sensor. Would this be the cause? Is there anything i can do to patch up the hole....like put silicone on it? I also tried to reset the ECU but it didn't work. Any suggestions.

 

did you check the codes, it could be your air temp sensor that was in your air box. What did you do with it?

 

Where in the air box is it located. I left the lower part of the air box in the car. Plus i didn't disconnect anything. I tried to reset the ECU but the light is still on.

 

I just checked the codes and they are 01 02 and 05 04. Any suggestions on what to do now? I checked all connections and they seem fine.

 

make sure your temp sensor is plugged in and 1-2 is MAF sensor

 

You usually get the MAF code when the car runs with the MAF connector unplugged or the IACV hose disconnected, using SEA FOAM or such. It should go away after clearing the code though. You might have fudged something else up.

 

what should i do about code 05 04? Should i bring it to the dealer? Have i voided any warranties by putting in the intake?

 

lol I don't know about voiding the waranty, that's what I'm concerned by too. I'm thinking taking off my intake and leaving the y-pipe on (when I get it), I just don't want those b|tches voiding my warranty.

 

0504
Diagnostic Trouble Code 0504 points to a problem with the Automatic Transmission Communications line. Pulse signals are exchanged between the Engine Control Module and the Transmission Control Module to assure smooth shifting during hard acceleration or deceleration.

This malfunction is detected when the ECM continuously receives an incorrect voltage from the TCM. Possible causes include...
- Harness or connectors (The communications line circuit between the ECM and the TCM is open or shorted.)
- TCM
- Discharged or faulty battery









0102
Diagnostic Trouble Code 0102 points to a problem with the Mass Air Flow Sensor. The MAFS is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a thin film that is supplied with electric current from the Engine Control Module. The temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot wire is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to the hot film as air flow increases. This maintains the temperature of the hot film. The ECM detects the air flow by means of this current change.

This malfunction is detected when an out-of-range voltage is sent to the ECM. That voltage might be too high or too low.

a) An excessively high voltage from the MAFS is sent when the engine is not running.
b) An excessively high voltage from the MAFS is sent under light load driving conditions.

Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Faulty MAFS

c) An excessively low voltage from the MAFS is sent when the engine is not running.
d) An excessively low voltage from the MAFS is sent under heavy load driving conditions.

Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Intake air leaks
- Faulty MAFS

With DTC 0102 the ECM is supposed to switch into Fail Safe mode and limit engine speed to 2400 rpm.

 

does this mean i have to bring it in to the dealer? How do I fix this?

 

Perhaps that 0504 code has been there only it didn't set off the CEL. What did set off your CEL is the 0102 code since that's the Mass Air Flow Sensor. And then when you pulled the codes from the ECU, that's when you found the 0102 and 0504 codes. I remembered when my 3rd gen maxima's auto tranny started shifting erratically, it had something to do with the TCM but I didn't get any CEL from it. I ended up getting the tranny rebuilt plus the TCM replaced. Cost me around $2500 since my car was no longer under warranty.

Now, what kind of nick are you talking about on the MAF? Does it seem like its causing unfiltered air to come in thru that nick and then into the metering device inside the MAF? If so, whatever you do, don't use silicone based sealant to plug it up because silicone will destroy the MAF sensor. Try those high temp duct tapes. Other than that I can't think of anything else to recommend.

 

Try to reground your MAF. Many people have done this. Check the harness and make sure wire/connection is good.

 

oh please someone tell me how u check what codes u have? do u go somewhere like autozone or pep boys
??/

 

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