What Does P0131 Mean on a 2022 Dodge Charger?
Code P0131 on your 2022 Dodge Charger signals that the Bank 1 Sensor 1 oxygen sensor circuit is reading below the expected voltage range. The 2022 Charger is available with the 3.6L Pentastar V6 (SXT/GT), 5.7L HEMI V8 (R/T), 6.4L HEMI V8 (Scat Pack), or the supercharged 6.2L HEMI (Hellcat/Redeye). On every variant, Bank 1 is the driver's side, and Sensor 1 is the upstream O2 sensor positioned before the catalytic converter. Since the HEMI V8s have dual exhaust banks, the code specifically isolates the issue to the driver-side exhaust stream.
Symptoms You'll Likely Notice
- Check engine light on the instrument cluster
- Fuel economy dropping 1-3 MPG below normal
- Rough or lumpy idle, particularly when cold
- Mild hesitation during moderate acceleration
- Possible rich exhaust odor from the driver-side tailpipe
Top Causes for the 2022 Charger
1. Degraded O2 Sensor Element
The upstream O2 sensor on the HEMI V8 sits directly at the exhaust manifold outlet where temperatures can exceed 1,400 degrees Fahrenheit. On the 2022 model with moderate mileage, the sensor's zirconia element can lose its ability to generate accurate voltage readings. Heat cycling between city driving and highway cruising accelerates this wear. The sensor essentially becomes sluggish and gravitates toward a low-voltage baseline.
2. Corroded or Damaged Wiring
The Charger's low-slung design means the undercarriage sees plenty of road spray, salt, and debris. The O2 sensor connector on Bank 1 can develop corrosion on its pins, or the harness can suffer abrasion where it routes past the transmission and exhaust. Even minor resistance added to the signal circuit can suppress the voltage reading.
3. Exhaust Leak Near the Manifold
HEMI exhaust manifolds are prone to bolt loosening and gasket failures due to the intense heat cycling. A small leak at the driver-side manifold introduces oxygen into the exhaust stream before it reaches the sensor, creating a false lean reading. This is especially common in colder climates where the temperature swings are most extreme.
4. Genuine Lean Condition
If the engine is actually running lean on Bank 1 due to a vacuum leak, failing injector, or fuel pressure drop, the O2 sensor is accurately reporting the condition. Companion code P0171 alongside P0131 is a strong indicator that the lean condition is real rather than a sensor fault.
How to Diagnose P0131
- Scan live data and monitor Bank 1 Sensor 1 voltage at idle and at 2,000 RPM. It should swing between 0.1V and 0.9V consistently.
- Compare Bank 1 and Bank 2 upstream sensor patterns — asymmetry suggests a bank-specific issue.
- Inspect the connector at the sensor for green corrosion, water intrusion, or bent terminals.
- Listen for manifold ticking at cold start on the driver's side.
- Check STFT and LTFT on Bank 1. If both are highly positive, investigate lean causes before replacing the sensor.
- Replace the sensor if diagnostics point to a failed unit. Use an OE Mopar part for best compatibility.
Repair Costs for the 2022 Charger
Parts cost for an OE upstream O2 sensor: $75–$185. Professional labor: $100–$200. Total shop estimate: $175–$385. HEMI exhaust manifold repairs (if that's the cause) run $400–$1,000 due to the labor involved in removing the manifold on a performance V8. DIY sensor replacement is feasible with a 22mm O2 sensor socket and some penetrating oil.
Can You Keep Driving?
Yes, short-term driving is fine. However, the HEMI's performance tuning depends on precise O2 feedback. Running with P0131 means the ECM is guessing at fuel delivery on Bank 1, which costs you power and fuel efficiency. Address it within a couple of weeks to keep your Charger running at its best.