Lambda Oxygen Sensor, BEFORE Catalytic Converter. Porsche 957 Cayenne 4.8L 2007-10  ❭  95560616802

Lambda Oxygen Sensor, BEFORE Catalytic Converter.
The OE MATCH Lambda Oxygen Sensor is an exhaust-gas sensor designed for installation before the catalytic converter, also known as the pre-cat or upstream position.

Fits:

• Porsche 957 Cayenne S / GTS 4.8L 2007-10
• Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10 

 
Diagram Ref No 7

The sensor measures the oxygen content of the exhaust gases leaving the engine and sends this information to the engine control unit (ECU). The ECU uses this feedback as part of its engine-management strategy to maintain the correct air/fuel mixture and efficient combustion. 

What This Product Does: 

The lambda sensor continuously measures the amount of oxygen remaining in the exhaust gases.

This information allows the ECU to determine whether the engine is operating with a mixture that is relatively rich or lean. The ECU can then make appropriate adjustments to fuel delivery to maintain efficient combustion under applicable operating conditions.

A correctly functioning pre-cat oxygen sensor helps:

• Monitor the engine's air/fuel mixture
• Provide exhaust oxygen information to the ECU
• Support accurate fuel-control adjustments
• Promote efficient combustion
• Maintain responsive engine operation
• Support good fuel economy
• Reduce unnecessary exhaust emissions
• Help protect catalytic converter performance

Symptoms Of Wear Or Failure:
Lambda sensors operate in an extremely demanding environment and are continually exposed to hot exhaust gases, combustion deposits and repeated temperature cycles.

As a sensor ages, its response can become slower or its readings can become inaccurate.

Common symptoms of a worn or failing pre-cat oxygen sensor can include:

• Check Engine Light / engine-management warning
• Lambda or oxygen-sensor fault codes
• Rich or lean mixture fault codes
• Increased fuel consumption
• Poor fuel economy
• Rough or inconsistent idle
• Hesitation during acceleration
• Reduced engine response
• Increased exhaust emissions
• Failed emissions test
• Irregular engine operation
• Incorrect or slow sensor readings during diagnostics
• Damaged wiring or electrical connectors

The exact symptoms depend on the nature of the failure and the vehicle's engine-management strategy.

Why Replacement Matters:
The ECU depends on accurate information from the pre-cat lambda sensor to help manage combustion effectively.

If the sensor becomes slow or inaccurate, the ECU may receive incorrect information about the oxygen content of the exhaust gases. This can affect fuel control and potentially lead to poor engine operation, increased fuel consumption and higher emissions.

Replacing a confirmed defective sensor can help restore:

• Accurate air/fuel mixture feedback
• Correct engine-management operation
• Efficient fuel delivery
• Smoother engine performance
• Improved fuel economy where the failed sensor was causing excessive consumption
• Correct emissions monitoring
• Reduced risk of recurring lambda-related fault codes

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95560616802

The product you are viewing cross references to these numbers