P0402 on Dodge Challenger
Factory diagnostic protocol and troubleshooting wire for fault code P0402 specifically for the Dodge Challenger (2020–2026, 3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP)).
1. Symptoms of P0402 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 P0402, 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
Connect an OBD-II scan tool and record freeze frame sensor telemetry for code P0402 to note engine RPM, load, and voltage when the fault triggered. on the Dodge Challenger equipped with 3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP).
Inspect the electrical connector and wiring harness related to P0402 for chafing, corrosion, moisture, or pin push-out. on the Dodge Challenger equipped with 3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP).
Measure circuit voltage supply (12V B+ or 5V reference) and sensor/actuator resistance according to factory repair manual specifications. on the Dodge Challenger equipped with 3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP).
Install a new OEM-grade replacement part, torque fasteners to factory spec, and ensure electrical locking tabs click firmly. on the Dodge Challenger equipped with 3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP).
Clear all stored DTCs from vehicle memory and perform an OBD-II drive cycle to confirm the diagnostic monitor resets to 'Ready'. 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 (P0402)
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 P0402 FAQs
What causes code P0402 to trigger on a Dodge Challenger?
On the Dodge Challenger (3.6L Pentastar V6 (305HP) / 5.7L HEMI V8 / 6.2L Redeye Widebody (807HP)), P0402 is most frequently caused by EGR valve stuck permanently open with carbon or Faulty EGR vacuum solenoid.
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 P0402?
Caution. Engine will stumble, buck, and stall at low RPMs. Given that P0402 carries a Medium severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.