OBD problem not rectified by dealer - P0702

SAFCBOBBYB

MEMBER
2004 JEEP GRAND CHEROKEE
137,000 MILES

Jeep Grand Cherokee 2.7 Diesel 2004
OBD Warning light showing code P0702 - Put it into Chrysler main dealer today - reported as follows:
Engine management light on - carried out diagnostic checks-
Fault codes stored P1130 Fuel Rail Pressure malfunction
cmp circuit p0340, t/case position sensor p0336,
.T/cpntrol p0702
'cleaned up all connections on multi-plug & control unit -
light has come back & will require further investigation'

mileage 137000 - only got this 3 weeks ago and had a full service done today but now warning light on continuously - no apparent loss of power or performance - any ideas?

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Code numbers never identify bad parts just failed systems.

You need someone with good diag skills, that can track each code down one at a time.

The 702 is a general trans failure code.

340 is a cam sensor code

1136 is a transfer case position sensor issue.

The fuel rail sensor code may be just that sensor. I have done a few and most of the time, it is the sensor.

Dont go throwing any parts at it as most of the time guesses are expensive and mostly wrong.

I would start with the trans code as it is the most vague and may end up with re building the trans.

Roy