O2 Sensor - Bank 1 Upstream
1972 Dodge Challenger · 440ci V8 Six Pack
Sensor Type
not-applicable
Waveform Type
not-applicable
Location
Not equipped - 1972 Dodge Challenger predates emission control oxygen sensors (introduced mid-1970s for California, federally in 1980-1981)
Pins
Unknown
Timebase
N/A
Voltage Scale
N/A
Trigger
N/A
Wiring
N/A - No oxygen sensor system
Expected Voltage Range
At Idle
0V to 0V
At Higher RPM
0V to 0V
Expected Pattern
Not applicable - open-loop carburetor fuel system
Known-Good Waveform
The 1972 model year used basic emission controls (PCV, evaporative canister) but no closed-loop fuel control or oxygen sensors. Fuel mixture is adjusted mechanically via carburetor jets and mixture screws.
Common Failure Patterns
N/A
Cause: Sensor not present on this vehicle
Diagnostic Tips
Use exhaust gas analyzer (HC, CO, CO2, O2 readings) for mixture diagnosis. Adjust mixture screws for 14.7:1 stoichiometric ratio or slightly rich for performance applications.
Related Diagnostic Trouble Codes
P0130P0131P0132P0133P0134
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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