____________________________________________________________________________________________
Page 50/55 UltraGauge™ EM User Manual www.ultra-gauge.com
T
T
r
r
o
o
u
u
b
b
l
l
e
e
C
C
o
o
d
d
e
e
s
s
.
.
.
.
In order to read or clear the trouble codes, the engine does not need to be running, but the ignition must be in the RUN position and
it must stay in this position.
C
C
l
l
e
e
a
a
r
r
C
C
h
h
e
e
c
c
k
k
E
E
n
n
g
g
i
i
n
n
e
e
MENU
Trouble Codes ..
Clear Check Engine
This not only turns off the check engine light, it also clears all the Trouble Codes posted by the vehicles ECM. Note that if the
trouble code was associated with a hard fault, such as a shorted sensor, the vehicle’s ECM will quickly repost the trouble code to
pending codes, or in some cases directly to the trouble codes and again light the check engine light. In this situation, it may appear
that the check engine light remains lit.
Note:
Some vehicles may not support this function. Vehicles supporting the VPM protocol such as older GM vehicles and some older
Chrysler vehicles have been found not to support this function.
E
E
n
n
g
g
i
i
n
n
e
e
T
T
r
r
o
o
u
u
b
b
l
l
e
e
C
C
o
o
d
d
e
e
s
s
MENU
Trouble Codes ..
Engine Trouble Codes
Displays any trouble code as well as the number of trouble codes. UltraGauge can display up to 20 codes.
Each trouble code is prefixed by a letter. The letters signify the following:
Trouble Code
Prefix Letter
Meaning
P Power
Train
C Chassis
B Body
U Undefined
The four numeric digits following the letter prefix uniquely identify the code for your vehicle. Each manufacturer may choose to
define codes differently and even differently among vehicle models.
The best approach to decode a trouble code is to search the web. For example, search for “2004 Dodge Durango P1002 Trouble
code”. There are several sites dedicated to providing trouble code information. Here are a few sample sites:
http://www.obd-codes.com/trouble_codes
http://www.troublecodes.net/technical
http://autorepair.about.com/od/obdcodedatabase/a/OBD_1996_year.htm
P
P
e
e
n
n
d
d
i
i
n
n
g
g
C
C
o
o
d
d
e
e
s
s
MENU
Trouble Codes ..
Pending Codes
Displays any pending trouble codes as well as the number of pending trouble codes. UltraGauge can display up to 20 pending codes.
Pending codes are potential issues discovered by the Vehicle’s ECM. These discovered issues are placed in the pending category
and watched by the ECM. If the issue persists after a certain amount of time or after a certain number of starts, the ECM will move
the code from Pending to the Trouble Code category, at which point the check engine light would be lit.
The format and meaning of Pending Codes is the same as that for Trouble Codes. See Engine Trouble Codes for additional detail.
