Actron GM Code Scanner CP9001 - Manual (Page 17)

17
21
Throttle position sensor
(TPS) - signal voltage is
high during engine idle or
deceleration.
22
Throttle position sensor
(TPS) - signal voltage is
low during engine idle.
OR
Fuel cutoff relay circuit -
open or shorted to ground.
23
Manifold air temperature
(MAT) sensor - signal
voltage is low or high.
OR
Throttle position sensor
(TPS) error.
OR
Mixture Control (M/C)
solenoid - open or short
circuit problems.
24
Vehicle speed sensor
(VSS) - open or short
circuit problems.
25
Manifold air temperature
(MAT) sensor - signal
voltage is low.
OR
Vacuum switching valve
circuit - open or shorted to
ground.
OR
ATS sensor - signal
voltage is high.
26
Quad-Driver module or
Quad-driver No. 1 error.
27
2nd gear switch.
OR
Quad-Driver module or
Quad-driver No. 2 error.
28
3rd gear switch.
OR
Quad-Driver module or
Quad-driver No. 3 error
(Corvette).
OR
(Transmission) Fluid
pressure switch assembly
- open or short circuit
problems.
29
4th gear switch.
OR
Quad-Driver module or
Quad-driver No. 3 error.
OR
Secondary air injection
system - circuit problems.
31
Manifold absolute pressure
(MAP) sensor - signal
voltage is low.
OR
Fuel injector.
OR
Park/Neutral switch -
circuit problems.
OR
CAM sensor - circuit
problems.
OR
Engine speed control
governor malfunction.
(Van)
OR
Turbocharger wastegate
overboost.
OR
Wastegate electrical signal
- open or shorted to
ground.
OR
Purge solenoid voltage
high (carburetor engines)
32
Barometric pressure (BARO)
sensor circuit failure.
OR
Exhaust gas recirculation
(EGR) valve diagnostic
switch - closed during
engine start-up or open
when EGR flow requested
by ECM.
OR
EGR/EVRV.
33
Mass air flow (MAF)
sensor - signal voltage or
frequency is high during
engine idle.
OR
Manifold absolute pressure
(MAP) sensor - signal
voltage is high during
engine idle. (Note: Engine
mis-fire or unstable idle
may cause this code.)
34
Mass air flow (MAF) sensor
- signal voltage or
frequency is low during
engine cruise.
OR
Manifold absolute pressure
(MAP) sensor - signal
voltage is low during
ignition on.
OR
Pressure sensor circuit -
signal voltage too high or
low (carburetor engines).
35
Idle air control (IAC)
system problem - can not
set desired RPM.
36
Mass air flow (MAF) sensor
- burn-off circuit problem.
OR
Transmission shift problem
(electronically controlled
transmissions only).
OR
Direct ignition system (DIS)
fault - loss of 24X signal or
extra or missing pulses in
electronic spark timing
(EST) signal.
OR
Ignition system fault - loss
of High Resolution Pulse
signal.
37
Brake switch stuck “on”.
38
Brake switch circuit fault.
OR
Knock sensor (KS) - open
circuit problem.
39
Torque converter clutch
(TCC) circuit fault.
OR
Clutch switch circuit
problems.
OR
Knock sensor (KS) - short
circuit problem.