P0140 on Dodge Challenger
Factory diagnostic protocol and troubleshooting wire for fault code P0140 specifically for the Dodge Challenger (2020–2026, 3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP)).
1. Symptoms of P0140 on Dodge Challenger
When the Engine Control Module (ECM/PCM) on your Dodge Challenger (3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP)) logs fault code P0140, drivers commonly observe:
2. Most Likely Causes on Dodge Challenger
Historical warranty claims and technical repair bulletins for Dodge Challenger point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Dodge Challenger
Inspect harness connector under vehicle floor pan. Verify plug is firmly seated and weather seal is intact. on the Dodge Challenger equipped with 3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP).
Check for 12V heater power and ground at connector with ignition ON. on the Dodge Challenger equipped with 3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP).
Remove and replace the downstream oxygen sensor with an OEM-spec part. on the Dodge Challenger equipped with 3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP).
Clear code and verify sensor activity returns on live telemetry. on the Dodge Challenger equipped with 3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP).
Equipment for Diagnosing Dodge Challenger (P0140)
Dodge Challenger OEM Replacement Sensor
Direct-fit replacement assembly engineered to OEM tolerances for Dodge Challenger.
AstroAI Auto-Ranging Digital Multimeter
Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.
BlueDriver Bluetooth Pro OBDII Scan Tool
Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.
Other Common Fault Codes on Dodge Challenger
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Dodge Challenger:
4. Dodge Challenger P0140 FAQs
What causes code P0140 to trigger on a Dodge Challenger?
On the Dodge Challenger (3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP)), P0140 is most frequently caused by Completely dead downstream O2 sensor or Disconnected sensor harness plug under car.
Where is the OBD-II port located on my Dodge Challenger?
On the Dodge Challenger, the 16-pin DLC diagnostic connector is located Under driver dash left of center stack. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.
Can I safely drive my Dodge Challenger with code P0140?
Yes, safe for normal driving without risk of breakdown. Given that P0140 carries a Low severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.