22
CODE MEANINGS
Code Definitions for FORD Engines with EEC-IV Computer System (Electronic
Engine Control system,
version IV)
Code definitions
are listed in this
section
• If more than one
definition is listed,
consult your vehicle
service manual to get
the specific meaning
for your vehicle.
• Code meanings can
vary with vehicle,
model year, engine
type, options and type
of test being per-
formed.
• Many of the codes
listed may not apply to
your vehicle.
• Follow vehicle service
manual procedures to
find the cause of the
code. Always start with
the first code
displayed.
Remember:
1) Visual inspections are
important!
2) Problems with wiring
and connectors are
common, especially for
intermittent faults.
3) Mechanical problems
(vacuum leaks, binding
or sticking linkages,
etc.) can make a good
sensor look bad to the
computer.
4) Incorrect information
from a sensor may
cause the computer to
control the engine in
the wrong way. Faulty
engine operation might
even make the
computer show a
different good sensor
as being bad!
Three Digit Codes:
Certain 1991 and newer
vehicles use 3 digit codes
to report the results of the
system Self-Test
procedure. Refer to your
vehicle service manual to
determine if your system
uses 2 or 3 digit codes.
The listing of 3 digit code
meanings begins on
page 24.
11
System pass.
12
System cannot raise engine
speed above normal idle.
13
RPM out of specification
during normal idle
operation.
or,
D.C. motor does not follow
dashpot.
14
The Electronic Control
Assembly (ECA) has
detected an intermittent loss
of Profile Ignition Pick-up
(PIP) signal during recent
operation.
15
Failure in Electronic Control
Assembly (ECA) –
problems with Keep Alive
Memory.
16
RPM too low during Engine
Run Self-Test (lean fuel
test).
or,
Idle Speed Control (ISC)
RPM out of Self-Test
specification.
or,
Electronic Distributorless
Ignition System (EDIS)
fault – Ignition Diagnostic
Monitor (IDM) signal not
received.
or,
Exhaust Gas Oxygen
(EGO) sensor – signal
voltage indicates “rich”
during Engine Run Self-
Test (lean air/fuel
conditions).
17
Exhaust Gas Oxygen
(EGO) sensor - signal
voltage indicates “rich”
during Engine Run Self-
Test (lean air/fuel
conditions).
or,
RPM too low during Engine
Run Self-Test (rich fuel
test).
or,
Idle Speed Control (ISC)
RPM below Self-Test
specification.
18
Loss of TACH signal to
Electronic Control
Assembly (ECA).
or,
Distributorless Ignition
System (DIS) fault –
primary circuit failure in coil
1,2,3 or 4.
or,
Electronic Distributorless
Ignition System (EDIS) fault
– failure in Spark Angle
Word (SAW) circuit.
19
Failure in Electronic Control
Assembly (ECA) –
problems with internal
voltage regulator.
or,
RPM too low for EGR
check during Engine Run
Self-Test.
or,
Cylinder Identification (CID)
sensor input failure.
