A vehicle’s oxygen sensor helps regulate the car engine’s air-fuel ratio. The air-fuel ratio sensor monitors the oxygen content in the exhaust stream and sends data to the computer so it can add or subtract fuel. Explosions in the combustion chambers are caused by the ignition of air and fuel. When the ratio of air and fuel is what it should be, the car will be able to operate properly.

Oxygen sensors and air-fuel ratio sensors are located within the exhaust system to monitor fuel-trim. The vehicle’s powertrain control module (PCM) relies on these sensors, among many, to fine-tune fuel delivery for maximum fuel economy, power, and performance. A failing or degraded sensor can result in a check engine light, poor performance, or reduced fuel economy and gas mileage. Check engine light codes do not always pinpoint the exact sensor requiring replacement. An accurate diagnosis by a professional technician will save you money and time.

The oxygen sensor and air-fuel ratio sensor must be in optimal working condition to keep your car in good shape. If you have noticed any of the following issues with your car, it’s best to have a mechanic take a look, as you might be dealing with an oxygen sensor or air-fuel ratio sensor issue:

• • Rough idling
  • Poor gas mileage
  • Engine pinging
  • Check engine light illumination
  • Increased exhaust emission

Bring your car into Hollenshade’s, and our Baltimore area mechanics will take a look at your exhaust system, identify and repair oxygen sensor issues or air fuel sensor problems, and have your car back into perfect condition in no time.

Common oxygen sensor fault codes:

1. P013A – O2 Sensor Slow Response – Rich to Lean (Bank 1 Sensor 2)
2. P013B – O2 Sensor Slow Response – Lean to Rich Bank 1, Sensor 2
3. P013C – O2 Sensor Slow Response – Rich to Lean (Bank 2, Sensor 2)
4. P013E – Sensor Delayed Response – Rich to Lean (Bank 1, Sensor 2)
5. P0014 – Exhaust Camshaft Position Timing – Over-Advanced (Bank 1)
6. P014A – Sensor Delayed Response – Rich To Lean (Bank 2, Sensor 2)
7. P0030 – HO2S Heater Control Circuit (Bank 1 Sensor 1)
8. P0036 – HO2S Heater Control Circuit (Bank 1, Sensor 2)
9. P0037 – HO2S Heater Control Circuit Low (Bank 1, Sensor 2)
10. P0038 – HO2S Heater Control Circuit High (Bank 1, Sensor 2)
11. P0040 – Oxygen Sensor Signals Swapped Bank 1 Sensor 1/Bank 2 Sensor 1
12. P0041 – Oxygen Sensor Signals Swapped Bank 1 Sensor 2/Bank 2 Sensor 2
13. P0050 – HO2S Heater Control Circuit (Bank 2, Sensor 1)
14. P0053 – HO2S Heater Resistance (Bank 1, Sensor 1)
15. P0054 – HO2S Heater Resistance (Bank 1, Sensor 2)
16. P0056 – HO2S Heater Control Circuit (Bank 1, Sensor 2)
17. P0059 – HO2S Heater Resistance (Bank 2, Sensor 1)
18. P0060 – HO2S Heater Resistance (Bank 2, Sensor 2)
19. P0131 – O2 Circuit Low Voltage (Bank 1, Sensor 1)
20. P0132 – O2 Circuit High Voltage (Bank 1, Sensor 1)
21. P0133 – O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
22. P0134 – O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
23. P0135 – O2 Sensor Heater Circuit (Bank 1 Sensor 1)
24. P0136 – O2 Circuit (Bank 1, Sensor 2)
25. P0137 – O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
26. P0138 – O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
27. P0139 – O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
28. P0140 – O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
29. P0141 – O2 Sensor Heater Circuit (Bank 1 Sensor 2)
30. P0150 – O2 Circuit (Bank 2, Sensor 1)
31. P0151 – O2 Circuit Low Voltage (Bank 2, Sensor 1)
32. P0152 – O2 Circuit High Voltage (Bank 2, Sensor 1)
33. P0153 – O2 Circuit Slow Response (Bank 2, Sensor 1)
34. P0154 – O2 Circuit No Activity Detected (Bank 2, Sensor 1)
35. P0155 – O2 Heater Circuit (Bank 2, Sensor 1)
36. P0157 – O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2)
37. P0158 – O2 Circuit High Voltage (Bank 2, Sensor 2)
38. P0159 – O2 Circuit Slow Response (Bank 2, Sensor 2)
39. P0161 – O2 Heater Circuit (Bank 2, Sensor 2)
40. P164A – O2 Sensor Positive Current Trim Circuit Performance (Bank 1 Sensor 1)
41. P164B – O2 Sensor Positive Current Trim Circuit Performance (Bank 2 Sensor 1)
42. P2195 – O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 1)
43. P2196 – O2 Sensor Signal Biased/Stuck Rich (Bank 1 Sensor 1)
44. P2197 – O2 Sensor Signal Biased/Stuck Lean – Bank 2, Sensor 1
45. P2198 – O2 Sensor Signal Biased/Stuck Rich – Bank 2, Sensor 1
46. P2227 – Barometric Pressure Sensor A Circuit Range/Performance
47. P2228 – Barometric Pressure Sensor A Circuit Low
48. P2229 – Barometric Pressure Sensor A Circuit High
49. P2230 – Barometric Pressure Sensor A Circuit Intermittent/Erratic
50. P2237 – O2 Sensor Positive Current Control Circuit Open – Bank 1, Sensor 1
51. P2240 – O2 Sensor Positive Current Control Circuit Open – Bank 2, Sensor 1
52. P2243 – O2 Sensor Reference Voltage Circuit Open – Bank 1, Sensor 1
53. P2247 – O2 Sensor Reference Voltage Circuit Open – Bank 2, Sensor 1
54. P2251 – O2 Sensor Negative Current Control Circuit Open – Bank 1, Sensor 1
55. P2254 – O2 Sensor Negative Current Control Circuit Open – Bank 2, Sensor 1
56. P2270 – O2 Sensor Signal Stuck Lean – Bank 1, Sensor 2
57. P2271 – O2 Sensor Signal Stuck Rich – Bank 1, Sensor 2
58. P2272 – O2 Sensor Signal Stuck Lean – Bank 2, Sensor 2
59. P2273 – O2 Sensor Signal Stuck Rich – Bank 2, Sensor 2
60. P2626 – O2 Sensor Positive Current Trim Circuit/Open (Bank 1 Sensor 1)
61. P2627 – O2 Sensor Pumping Current Trim Circuit Low Bank 1, Sensor 1
62. P2628 – O2 Sensor Positive Current Trim Circuit High (Bank 1 Sensor 1)
63. P2629 – O2 Sensor Positive Current Trim Circuit/Open (Bank 2 Sensor 1)
64. P2630 – O2 Sensor Pumping Current Trim Circuit Low Bank 2, Sensor 1
65. P2631 – O2 Sensor Positive Current Trim Circuit High (Bank 2 Sensor 1)