P0131 on the 2023 Dodge Charger Explained
The 2023 Dodge Charger — one of the final model years for the iconic LD platform — has triggered code P0131, indicating the Bank 1 Sensor 1 oxygen sensor is outputting voltage below the ECM's expected minimum. Whether you have the 3.6L Pentastar V6, 5.7L HEMI V8, 6.4L HEMI (Scat Pack/392), or the supercharged 6.2L HEMI (Hellcat/Redeye/Jailbreak), Bank 1 is the driver's side and Sensor 1 is the upstream pre-catalytic converter sensor.
What You'll Experience
- Check engine light on the dash
- Noticeable dip in fuel economy
- Idle may feel rougher than usual
- Slight hesitation or bog during acceleration
- Rich exhaust smell possible from driver-side exhaust
Root Causes on the 2023 Charger
1. O2 Sensor Failure
Even on a relatively new 2023 model, the upstream O2 sensor can fail. HEMI V8s subject the sensor to extreme thermal stress — exhaust gas temperatures at the manifold outlet regularly exceed 1,400°F. The sensor's internal heating element can burn out, or the zirconia sensing element can become contaminated by oil vapors that pass through the PCV system. When the sensor can no longer generate proper voltage swings, it defaults low.
2. Wiring or Connector Problem
On a vehicle this new, wiring issues are less about age and more about manufacturing defects or physical damage. Check for wire chafing where the harness passes near the exhaust manifold heat shield, or for a connector that wasn't fully seated at the factory. Road debris or a curb strike can also damage the sensor wiring running along the undercarriage.
3. Exhaust Manifold Leak
The HEMI V8's cast exhaust manifolds are notorious for developing leaks. Manifold bolts can back out due to repeated heat cycling, or the manifold itself can crack. On the driver's side, a leak near the Sensor 1 location introduces fresh air into the exhaust, making the sensor read lean (low voltage). The telltale sign is a ticking sound at cold startup that fades as the engine warms.
4. Lean Fuel Delivery
If the engine actually has a lean condition on Bank 1 — from a vacuum leak at the intake manifold, a dropped fuel injector, or reduced fuel pressure — the O2 sensor is reporting accurately. Check for P0171 alongside P0131 to confirm a real lean condition rather than a sensor fault.
Diagnosis Guide
- Scan for all stored codes and review freeze frame data to understand when P0131 set.
- Monitor Bank 1 Sensor 1 voltage live — it should oscillate between 0.1V and 0.9V at idle with the engine warmed up.
- Compare with Bank 2 Sensor 1 on V6 and V8 models. If Bank 2 cycles normally and Bank 1 is stuck low, the issue is bank-specific.
- Visually inspect the O2 sensor connector and trace the harness for damage near heat sources.
- Check for manifold leaks — spray soapy water at the manifold-to-head gaskets and watch for bubbles at idle.
- Review fuel trims. If Bank 1 STFT and LTFT are both significantly positive, look for a real lean cause.
What the Repair Costs
For a 2023 model, this repair should be covered under the 3-year/36,000-mile basic warranty or the 8-year/80,000-mile emissions warranty. Out of pocket, expect $80–$185 for an OE sensor and $100–$200 for labor, totaling $180–$385. HEMI manifold repairs can run $400–$1,000 if that's the root cause.
Should You Drive It?
Short-term, yes. The Charger remains drivable and safe. But given it's likely still under warranty, there's no reason to delay. Schedule a dealer visit to get it inspected and repaired at no cost before the warranty window closes.