OTC Tools Code Scanner Manual Del Usuario página 27

Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal not switching
during Engine Run Self-
Test. Indicates "lean" (Bank
#2).
Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal not switching
during Engine Run Self-
Test. Indicates "rich" (Bank
#2).
Cold Start Injector (CSI) –
insufficient flow during
Engine Run Self-Test.
Exhaust Gas Oxygen
(EGO) sensor – no
switching detected (Bank
#2).
Fuel system indicates
"lean" with high flow
demand.
Exhaust Gas Oxygen
(EGO) sensor – no
switching detected (Bank
#1).
Mass Air Flow (MAF)
sensor – signal voltage is
too low
Mass Air Flow (MAF)
sensor – signal voltage is
too high
Mass Air Flow (MAF)
sensor – signal voltage is
higher or lower than
expected.
"Downstream" Heated
Exhaust Gas Oxygen
(HEGO) sensor – voltage
signal indicates "lean"
(Bank #1).
"Downstream" Heated
Exhaust Gas Oxygen
(HEGO) sensor – voltage
signal indicates "rich"
(Bank #1).
Throttle Position (TP)
sensor – insufficient signal
voltage change during
Dynamic Response test
(Engine Run Self-Test).
"Downstream" Heated
Exhaust Gas Oxygen
(HEGO) sensor – signal
voltage too high.
"Downstream" Heated
Exhaust Gas Oxygen
(HEGO) sensor – signal
voltage too low.
Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal not switching
(Bank #1).
Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal indicates
"lean" (Bank #1).
Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal indicates
"rich" (Bank #1).
Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal not switching
(Bank #2).
Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal indicates
"lean" (Bank #2).
Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal indicates
"rich" (Bank #2).
Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal not
switching: indicates "rich"
during part throttle engine
operation (Bank #1).
Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal not
switching: indicates "lean"
during part throttle engine
operation (Bank #1).
Electronic Control
Assembly (ECA) status –
adaptive "rich" limit reached
in fuel control program
(engine idle, Bank #1).
Electronic Control
Assembly (ECA) status –
adaptive "lean" limit
reached in fuel control
program (engine idle, Bank
#1).
Mass Air Flow (MAF)
sensor – signal voltage is
higher than expected.
27
Mass Air Flow (MAF)
sensor – signal voltage is
lower than expected.
Injector pulsewidth higher
than expected or Mass Air
Flow (MAF) sensor signal
voltage is lower than
expected.
Injector pulsewidth lower
than expected or Mass Air
Flow (MAF) sensor signal
voltage is higher than
expected.
Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal not
switching: indicates "rich"
during part throttle engine
operation (Bank #2).
Heated Exhaust Gas
Oxygen (HEGO) sensor –
voltage signal not
switching: indicates "lean"
during part throttle engine
operation (Bank #2).
Electronic Control
Assembly (ECA) status –
adaptive "rich" limit reached
in fuel control program
(engine idle, Bank #2).
Electronic Control
Assembly (ECA) status –
adaptive "lean" limit
reached in fuel control
program (engine idle, Bank
#2).
Flexible Fuel Sensor –
circuit failure.
Profile Ignition Pick-Up
(PIP) sensor – circuit
failure.
Loss of Ignition Diagnostic
Monitor (IDM) signal –
short
to ground in Spark Output
(SPOUT) circuit.
Spark Output (SPOUT)
circuit – open connection
failure.
Cylinder Identification (CID)
sensor – circuit failure.
Ignition system (distributor-
less) problem – Coil #1
primary side circuit failure.