99 grand Cherokee? what engine 4.0L or 4.7L ??????
did you read chapter 25 yet. service manual>?
99 in GEN2, WJ jeep. (USA name and car)
p1494
P1 means factory only code, not USA FED code P0
so only the jeep book is truth here, okay.?
chapter name Emission controls 25
page 13 there
posted over 300 times. now.
Leak Detection Pump Sw or
"Mechanical Fault
Incorrect input state detected for the Leak Detection
Pump (LDP) pressure switch."
this system is the EVAP system in bar stool talk its
the fuel tank fume vent smog prevention system.
try a new cap, put it on get it tight , reset the code.
using a scan tool and see if it comes back.
if yes the tests are complex. see page
Ill not repeat the 30 pages of test to you, page 21 is begin page. see that?
see the leak down tests?
WJ jeeps.
http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service
P1494 Leak detection pump pressure switch or mechanical fault
SOURCE: SE PRENDE UN FOCO DEL TABLERO QUE CREO SIGNIFICA
Asumimos que la luz que se enciende es la que dice CHECK ENGINE, y si ha notado algun consumo elevado de gasolina, es porque algun sensor esta fallando o enviando aviso que alguno de los componentes esta por fallar; generalmente podria ser algun sensor de oxigeno, pero para saber correctamente que medida adoptar tendras que "escanear" la computadora del vehiculo; con los codigos de fallo que arroje el escaner podremos brindar mayores detalles de solucion al problema.
Mantengase en contacto y dejenos saber sus avances.
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