Walker Products Oxygen Sensor 250-22009
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Walker Products Oxygen Sensor 250-22009
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Oxygen Sensor for 1990-1992 Lexus LS400 - Walker 250-22009

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$82.99
WARNING:California Proposition 65▾
MPN: 250-22009
Item Package Code: EA
Part Has Core (Y/N): N
Item Package Quantity: 1
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Walker Products Oxygen Sensor P/N:250-22009
Walker Products Oxygen Sensor P/N:250-22009
$82.99

Walker Products 250-22009 oxygen sensor for the 1990-1992 Lexus LS400 V8 4.0L measures the oxygen content of the exhaust gas. This downstream Walker Products oxygen sensor passes that reading to the engine computer, which uses it to monitor the air-fuel ratio and combustion efficiency.

  • Monitors exhaust gases to support lower emissions
  • Electrodes coated with a gas-permeable platinum layer
  • Measures oxygen levels to help the engine computer fine-tune the air-fuel mixture and fuel economy
  • Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust

Quick facts

  • Part: Walker Products 250-22009 oxygen sensor
  • Fits: 1990-1992 Lexus LS400 V8 4.0L
  • Position: Downstream
  • Condition: New

A worn sensor can show up as rough running, higher fuel consumption or a lit malfunction indicator light. Those signs alone do not prove the sensor is the problem, since a vacuum leak, for example, can produce similar symptoms.

Fits

This listing is one downstream sensor for the 1990-1992 Lexus LS400 V8 4.0L, and that car takes one.

Specifications

Fit and size

  • Position: Downstream
  • Quantity per vehicle: 1
  • Thread: M18 - 1.5

Build and materials

  • Sensor type: Narrow-band
  • Electrodes: coated with a gas-permeable platinum layer
  • Condition: New

Frequently Asked Questions

Is this oxygen sensor for the 1990-1992 Lexus LS400 V8 4.0L a downstream sensor?

Yes. Walker Products 250-22009 is a downstream oxygen sensor for the 1990-1992 Lexus LS400 V8 4.0L, and that car takes one.

Is this oxygen sensor narrow-band or wideband?

It is a narrow-band sensor with an M18 - 1.5 thread. Walker Products 250-22009 is made for the downstream position.

What does the coating on this oxygen sensor's electrodes do?

The coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates in the exhaust gases. The electrodes themselves carry a gas-permeable platinum layer.

Can a bad downstream oxygen sensor raise fuel consumption?

It can; higher fuel consumption is one sign, along with rough running or a lit malfunction indicator light. A shop can test the sensor and its wiring.

How can I check a downstream oxygen sensor for damage?

With the engine off and cool, look over the sensor, its wiring harness and its connector for physical damage. Damage there can shorten the sensor's life, and a shop can test its output.

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