Ran diagnostic on my 97 4x4 4.6L and came up with codes for P0453 (evap emissions pressure sensor) and B1867 (intergrated air bag monitor module). Can anyone put this in terms I can grasp and any advise would be awesome.

Thanks alot

 

Have you recently installed a chip?

 

No chip, yet.

 

The air bag diagnostic monitor measures the voltage at pin C209-14, circuit 937 (R/W), of the air bag diagnostic monitor connector. Voltage at pin C209-14, circuit 937 (R/W) should be equal to battery voltage. If the voltage at pin C209-14, circuit 937 (R/W), drops to less than 8 volts, the air bag diagnostic monitor will flash a lamp fault code (LFC) 12 on the air bag indicator. If the voltage at pin C209-14, circuit 937 (R/W), drops to less than 5 volts, the diagnostic trouble code (DTC) B1867 will also be stored in memory. Should the loss of battery voltage at pin C209-14, circuit 937 (R/W), be intermittent or repaired, the air bag diagnostic monitor will flash a LFC 52 (or higher priority code if one exists) on the next ignition switch cycle.


NOTE: If a short to ground exists on any of circuits 607 (LB/O), 614 (GY/O), 615 (GY/W), or 616 (PK/BK), 1112 (W/LB), 1113 (Y/LG), leading to a LFC 13 or 53 and DTC B1913 or similarly a short to ground exists on any of circuits 617 (PK/O), 619 (PK/W), 624 (Y/W) or 625 (Y/LG) leading to a LFC 14 or 54 and DTC B1914 the air bag diagnostic monitor will activate an internal solid state switch at pin C209-13 of the air bag diagnostic monitor. This causes the battery fuse 2 (10A) to blow, thus disarming the air bag system and preventing inadvertent air bag deployment. If the power distribution box battery fuse 2 has blown, it must be replaced by a 10A fuse.

check this fuse first. the air bag monitor will blow it if it sees a problem that could set off the air bags.

 

P0453: CHECK FOR HIGH FTP SENSOR VOLTAGE
Diagnostic Trouble Code (DTC) P0453 indicates that Self-Test has detected a FTP circuit input above the maximum.

Possible causes:

FTP open.
FTP short to VREF or VPWR.
VREF shorted to VPWR.
SIG RTN open.
Damaged FTP sensor.
Damaged PCM.

most likely unplugged or damaged fuel tank pressure sensor. i'm not sure if this code could come up from driving with the gas cap off or if the cap doesnt hold pressure.

 

Hey thanks alot.
I will check the fuse later (wife has the truck) and try to find the FTP (on the gas tank?) Post later to update.

The advise is very much appreciated

Derrick

 

yes the FTP is on the fuel tank up on top. lets us know what you find.

 

Air bag fuse was blown and I changed it, but still is blinking same code. Cant find short or open anywhere. FTP sensor is reading fine and has continuity, cant find short or open anywhere on it either to PCM or to charcoal canister.
AAAAAARRRRRRGHHHH! I HATE ELECTRICAL CRAP!
Guess I will take it in to an electrical guy soon, dammit.

Thanks for your help MR. Bentwrench.