LEFT Lambda Sensor, BEFORE Catalytic Converter. Porsche 958 Cayenne / 970 Panamera  ❭  95860613301

LEFT Lambda Sensor, BEFORE Catalytic Converter.

Restore accurate air-fuel mixture monitoring and dependable engine-management operation with this OE Match LEFT Lambda Sensor. Designed for compatible Porsche applications, this sensor is fitted on the LEFT side BEFORE the catalytic converter, where it measures oxygen levels in the exhaust gases leaving the engine.

Fits:

• Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
• Porsche 970.1 Panamera S Hybrid V6 3.0L 2011-13
• Porsche 970.2 Panamera S E-Hybrid V6 3.0L (416Hp) 2014-16  

Diagram Ref No 13

Also known as an oxygen sensor, O2 sensor or lambda probe, the pre-catalyst lambda sensor provides the engine control unit (ECU) with essential information about combustion conditions. By measuring the amount of residual oxygen in the exhaust, it helps the ECU determine whether the engine is operating richer or leaner than intended.

The ECU can use this feedback to adjust fuel delivery, helping maintain the correct air-fuel mixture under changing engine speeds, loads and operating conditions. Accurate lambda sensor operation contributes to efficient combustion, smooth performance, controlled emissions and effective catalytic converter operation.

Lambda sensors work in an extremely demanding environment and are continually exposed to high exhaust temperatures, vibration, moisture, combustion deposits and repeated thermal cycling. Over time, the sensing element can become contaminated or slow to respond, while the heater circuit, wiring and electrical connections may also deteriorate.

This OE Match LEFT Lambda Sensor provides a high-quality replacement for a confirmed faulty, contaminated or slow-response pre-catalyst sensor.

What This Product Does:

• Measures oxygen content in the exhaust gases.
• Fits the LEFT-side exhaust system where specified.
• Operates BEFORE the catalytic converter.
• Sends exhaust-mixture information to the ECU.
• Helps determine whether combustion is rich or lean.
• Supports closed-loop fuel control.
• Allows the ECU to make appropriate fuel corrections.
• Helps maintain the intended air-fuel mixture.
• Supports smooth idle and consistent engine performance.
• Helps maintain responsive acceleration.
• Contributes to efficient fuel consumption.
• Helps control exhaust emissions.
• Supports effective catalytic converter operation.
• Provides information used for engine diagnostics.
• Replaces a slow, inaccurate, contaminated or failed lambda sensor.  

Symptoms Of Wear Or Failure:

• Check engine or engine-management warning light.
• Lambda or oxygen sensor fault codes.
• Left-bank oxygen sensor faults.
• Rich or lean mixture fault codes.
• Increased fuel consumption.
• Rough or unstable idle.
• Engine hesitation.
• Poor throttle response.
• Reduced engine performance.
• Uneven engine operation.
• Engine misfires.
• Difficult starting.
• Increased exhaust emissions.
• Failed emissions test.
• Strong fuel smell from the exhaust.
• Slow lambda response during diagnostic testing.
• Implausible oxygen sensor readings.
• Intermittent sensor operation.
• Oxygen sensor heater circuit fault.
• Damaged or heat-affected wiring.
• Corroded or damaged electrical connector.  

Why Replacement Matters:

• The before-catalyst lambda sensor plays an important role in maintaining the correct engine air-fuel mixture.
• Once the engine reaches the appropriate operating conditions, the ECU can use lambda feedback to continuously refine fuel delivery. The sensor needs to react accurately as engine load, speed and operating conditions change.
• A worn lambda sensor does not always stop functioning completely. Instead, it may become progressively slower or less accurate.

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95860613301

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