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- Porsche 957 Cayenne 3.6L 2007-10
Restore accurate exhaust monitoring and dependable engine-management operation with this OE Match Lambda Oxygen Sensor,. Designed for compatible Porsche applications, this sensor is positioned AFTER the catalytic converter and is specified for the exhaust bank serving cylinders 1–3.
Fits:
- Porsche 957 Cayenne 3.6L 2007-10
Diagram Ref No 31
Also known as an oxygen sensor, O2 sensor or lambda probe, this component measures the oxygen content present in the exhaust gases. Because this particular sensor is located downstream of the catalytic converter, one of its primary roles is to provide the engine control unit (ECU) with information used to monitor catalytic converter operation and overall exhaust-system performance.
The ECU compares information from sensors positioned before and after the catalytic converter. Changes in these signals allow the engine-management system to assess whether the catalyst is storing and converting exhaust pollutants as expected.
Lambda sensors operate in an exceptionally demanding environment, exposed to very high exhaust temperatures, vibration, moisture and combustion deposits. Over time, the sensing element can become contaminated or electrically degraded, while wiring and connectors may suffer heat-related damage.
This OE Match Lambda Oxygen Sensor provides a high-quality replacement for a slow, inaccurate or failed downstream sensor.
What This Product Does:
- Measures oxygen content in the exhaust gases.
- Is positioned AFTER the catalytic converter.
- Is specified for the exhaust bank serving cylinders 1–3.
- Sends exhaust oxygen information to the ECU.
- Helps monitor catalytic converter performance.
- Allows comparison between upstream and downstream exhaust readings.
- Helps the ECU identify abnormal catalyst operation.
- Supports emissions-system diagnostics.
- Helps detect implausible exhaust sensor readings.
- Supports correct engine-management monitoring.
- Helps maintain reliable emissions-control system operation.
- Replaces a slow, contaminated or failed oxygen sensor.
- Provides an OE Match replacement for compatible Porsche applications.
- Check engine or engine-management warning light.
- Oxygen sensor-related diagnostic fault codes.
- Catalyst efficiency-related fault codes.
- Slow or implausible downstream oxygen sensor readings.
- Intermittent sensor signal. Emissions warning messages.
- Vehicle failing an emissions test.
- Increased exhaust emissions.
- Increased fuel consumption in some circumstances.
- Rough or inconsistent engine operation where sensor faults affect control strategy.
- Damaged sensor wiring. Heat-damaged wiring insulation.
- Corroded or contaminated electrical connector.
- Sensor heater circuit fault.
- Open or short-circuit diagnostic faults.
- Sensor becoming seized in the exhaust mounting point.
Why Replacement Matters:
- The downstream oxygen sensor provides important information about the condition and operation of the emissions-control system.
- The catalytic converter chemically converts harmful exhaust gases into less harmful emissions. To assess catalyst performance, the ECU can compare oxygen-sensor behaviour before and after the catalytic converter.
- If the downstream sensor becomes slow, inaccurate or completely inoperative, the ECU may no longer receive reliable information about catalyst operation. This can result in diagnostic fault codes and an illuminated engine-management warning light.
- A failed sensor can also make accurate diagnosis of the catalytic converter more difficult. If the ECU cannot trust the downstream sensor signal, it may be unable to distinguish reliably between a sensor problem and an actual catalyst-efficiency issue.
- Replacing a confirmed faulty OE Match Lambda Oxygen Sensor restores dependable downstream exhaust monitoring and allows the engine-management system to assess emissions-system performance correctly.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95560613630
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