Multi-code OBD2 diagnosis
Enter all the codes your scanner showed, not just the first one. We give you the overall severity, whether you can keep driving, the order in which to check them and how they relate to each other.
Summary
- Overall severity
- Medium
- Can I keep driving?
- Yes, no immediate risk
- Estimated cost
- $50 to $400
- Codes analyzed
- 1 of 1
The order below is the recommended one: first the codes that can cause the others. After each repair, clear the codes and check which ones come back.
Order of inspection
P0151 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1) Medium
The P0151 code means the bank 2 sensor 1 oxygen sensor is reading low voltage all the time, which the computer reads as a lean mixture. The most common causes are an exhaust leak ahead of the sensor, an aging sensor, or a signal wire shorted to ground. You can usually keep driving for now, but an upstream fault can raise fuel use and wear out the catalytic converter over time.