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Appendix
Scan Parameters
Please note that not every vehicle will support every parameter. For example, most V6-equipped
vehicles do not have a passenger-side O2 sensor; therefore, codes such as LFT2 & O2R will return
“T.O.” (timeout). The engine type selected on the Config screen will also determine which parameters
are available on the screen when you’re configuring the scanner.
Standard OBD2 Parameters: (supported by all compatible vehicles except as stated above)
Parameter
Description Typical Value
B Boost (L67 only) 0 to 10 PSI at wide-open throttle
CLSD Closed-loop status 0 (open loop) when cold
1 (closed loop) after engine
warms up
ECT Engine coolant temperature 185-220 deg F
IAT Intake air temperature Depends on the weather; rises
above ambient as engine warms
up
IGN Ignition advance Varies: 15-20 degrees at idle, 20-
30 at full throttle
LD Engine load (calculated by
the vehicle’s computer)
0-100%, depending on conditions.
2 or 3% or so at idle.
LFT1
LFT2
Long-term fuel trim, driver’s
side & passenger side
-10 to +10%
Zero after battery change or
vehicle computer reset
MAF Mass air flow From 0.5-1 lb/min at idle to 30-
35 at full throttle
MAP Manifold air pressure 9-10”Hg at idle to near 30 at full
throttle
O2L
O2R
Oxygen sensor, driver’s side
Oxygen sensor, passenger
side
Should move around a lot after
engine warms up; 850mV to
950mV at full throttle
RPM Engine speed 600-700 at warm idle, up to 6000
or more before shifts at full
throttle
SPD Vehicle speed Should match speedometer
SFT1
SFT2
Short-term fuel trim, driver’s
side & passenger side
-10 to +10%
Zero after battery change or
vehicle computer reset