p1157
Moderate
Porsche · Sedans & Sports Cars
O2 Sensor Circuit Bank 2 Sensor 1
Quick Answer
Error code P1157 on your Porsche Sedans & Sports Cars means: O2 Sensor Circuit Bank 2 Sensor 1. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Inspect oxygen sensor wiring and connector for damage
2
Test sensor heater circuit resistance and operation
3
Measure sensor voltage with a scope during idle and acceleration
4
Check for exhaust leaks near the sensor location
5
Replace oxygen sensor if out of specification
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Oxygen sensor
Sensor connector pins
Exhaust gaskets
Sensor socket tool
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