code 36 and 72 ?¿?¿?¿?¿

[gnel]

My sub stalled right after start up 2 days in a row then driving about 10 miles it went into limp mode. I pulled over and shut the truck off after restart it was aok. I checked the codes and got 36 inj pulse width error long and 72 vehicle speed sensor loss. Any ideas ? I have a road trip coming up with the inlaws and don´t want any probs. Thanks for any replys g

 

[THEFERMANATOR]

The code 36 I believe can be air in the fuel system. The code 72 should come along with a malfunctioning speedo as well I would think. If the speedo is working then it is probably a wiring issue somewhere.

 

[gnel]

Thanks ferm for the reply. Do you know what makes the speedo function? Tranny? And yes the speedo is still functioning.

 

[NVW]

Check all the grounds, especially the ones by the trans dipstick.

 

[JiFaire]

Intermittent PMD or ground issue can also cause both of these; 36 tends to be a 'cascade' code, and if you can get it to stop, often you can get the others to disappear.