After installing a crate engine codes P0300, P0102, P0113, P0100 appeared?

EARL91

MEMBER
2009 GMC SIERRA
V8
2WD
AUTOMATIC
15,000 MILES

So, a guy just put a new crate motor in it. The truck starts and runs but has 8 dtc one of them being a misfire. It acts like the timing is off. I been scratching my head trying to figure out what this guy has done wrong. Here are just a few of the codes it has. P0300, p0102, p0113, p0100. Please help. If I need to start multiple threads I will do so. This guy has been without his truck for too long. Thank you.

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,940 POSTS

Hello Earl,

These codes have to do with the MAF sensor, did you try a new part? I would not try to clean it because once we get these codes cleaning will not help. I would get a new one.

P0300 - Random/Multiple Cylinder Misfire Detected: This code suggests that multiple cylinders in your engine are misfiring.

P0102 - Mass Air Flow (MAF) Circuit Low Input: This code indicates a problem with the Mass Air Flow sensor or its circuit.

P0113 - Intake Air Temperature (IAT) Sensor 1 Circuit High Input: This code signifies that the Intake Air Temperature sensor is reporting a higher-than-normal voltage.

P0100 - Mass or Volume Air Flow Circuit Malfunction: This is a general code for a problem with the Mass Air Flow sensor or circuit, similar to P0102.

Here is the location of the sensor so you can change it out then clear the codes. Also make sure there are no leaks between the throttle body and MAF sensor. Note: the MAF sensor can only be installed in one direction. Check out the images (below). Please let us know what happens.

Images (Click to make bigger)