O2 Sensor - Bank 1 Downstream
1972 Dodge Challenger · 440ci V8 Six Pack
Sensor Type
not-applicable
Waveform Type
not-applicable
Location
Not equipped - 1972 Dodge Challenger has no catalytic converters or downstream oxygen sensors
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 - no catalytic converter monitoring
Known-Good Waveform
Catalytic converters were not mandated until 1975 model year. The 1972 440 Six Pack uses cast iron exhaust manifolds feeding into pipes with no catalysts or post-catalyst oxygen sensors.
Common Failure Patterns
N/A
Cause: Sensor not present on this vehicle
Diagnostic Tips
Backpressure should be minimal (under 1.5 psi at 2500 RPM). Check for exhaust restriction using pressure gauge in spark plug hole or tailpipe measurement.
Related Diagnostic Trouble Codes
P0136P0137P0138P0139P0140
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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