Actron GM Code Scanner CP9001 - Manual (Page 18)

18
41
Cam sensor (CAM) failure.
OR
Cylinder select error.
OR
Tach input error - no
reference pulses during
engine run.
OR
Electronic spark timing
(EST) circuit - open or
shorted to ground during
engine run.
OR
Direct ignition system
(DIS) fault - bypass circuit
open or shorted to ground
during engine run.
OR
Ignition system fault - loss
of 1X Reference Pulse
signal.
42
Electronic spark timing
(EST) circuit - open or
shorted to ground during
engine run.
OR
Direct ignition system
(DIS) fault - bypass circuit
open or shorted to ground
during engine run.
OR
Fuel cutoff relay circuit -
open or shorted to ground.
43
Electronic spark timing
(EST) circuit - low voltage
detected.
OR
Electronic spark control
(ESC) - circuit problems.
44
Lean exhaust indication -
oxygen (O
2
) sensor voltage
stays low after one or two
minutes of engine run.
(Left sensor on dual
sensor engines.)
45
Rich exhaust indication -
oxygen (O
2
) sensor voltage
stays high after one minute
of engine run. (Left sensor
on dual sensor engines.)
46
Vehicle anti-theft system
(VATS) failure.
OR
Power steering pressure
switch failure.
47
Electronic control module
(ECM) computer circuit
problems - universal
asynchronous receiver/
transmitter (UART) link or
data loss.
OR
Knock sensor module
located in the computer is
not working properly.
48
Misfire symptom.
OR
Mass air flow (MAF)
sensor - open or short
circuit MAF sensor signal.
49
High idle RPM or vacuum
leak (Saturn).
51
Electronic control module
(ECM) computer circuit
problems - faulty
programmable read-only
memory (PROM), MEM-
CAL, ECM or checksum
errors.
52
Electronic control module
(ECM) computer circuit
problems - faulty or missing
CALPAC or MEM-CAL,
analog to digital converter
(A/D) error or Quad-Driver
module (QDM) fault.
OR
Oil temperature sensor -
signal voltage is low
(Corvette).
OR
System voltage high for a
long period of time.
(Electronic transmission
note: this fault may cause
other codes to be set.)
53
Over voltage condition.
(Electronic transmission
note: this fault may cause
other codes to be set.)
OR
Exhaust gas recirculation
(EGR) - system problems
or EGR Solenoid No.1
problem.
OR
Voltage reference error.
OR
Vehicle anti-theft system
(VATS) problems.
54
Low fuel pump voltage.
OR
Fuel pump relay.
OR
EGR Solenoid No. 2
failure.
OR
Quad-Driver module
(QDM) output failure.
OR
Mixture Control (M/C)
solenoid - circuit voltage
too high.
55
Electronic control module
(ECM) computer circuit
problems - ECM failure,
serial bus error, SAD error
or fuel lean malfunction.
OR
EGR Solenoid No. 3
failure.
56
Corrosivity/add coolant.
OR
Port throttle system
vacuum sensor problems.
OR
Quad-Driver “B” fault.
57
Boost Control problem.
58
Vehicle anti-theft system
(VATS) problem.
OR
Transmission Temperature
Sensor (TTS) - short circuit
problem in sensor or
wiring.
OR
Transmission fluid
temperature high.
59
Transmission Temperature
Sensor (TTS) - open circuit
problem in sensor,
connector or wiring.
OR
Transmission fluid
temperature low.