Keep closed-loop fuel control and catalyst monitoring reporting accurately with the Delphi Oxygen Sensor ES20045, a direct-fit replacement for the 2001-2002 Chrysler PT Cruiser, 2001-2004 Chrysler Sebring, 2001-2002 Dodge Neon, 2001-2004 Dodge Stratus, 1999-2000 Jeep Grand Cherokee, and 2001 Plymouth Neon. This is the rear (downstream) sensor, positioned in the exhaust after the catalytic converter.
- Rear/downstream placement: samples exhaust gas after the catalytic converter so the engine control module can watch how the catalyst is working.
- Signal role: generates a voltage signal that reports the oxygen content in the exhaust stream back to the ECM.
- Direct-fit replacement: installs on the listed applications in place of a worn or contaminated original sensor.
Over time an oxygen sensor can slow down or drift as it ages. If a failed rear sensor is the cause of an illuminated check engine light or an oxygen-sensor/catalyst-efficiency code, this Delphi unit replaces it. Diagnose the underlying cause before replacing, since these symptoms can have other sources.
Manufacturer part number: ES20045.
Frequently Asked Questions
Where is the ES20045 oxygen sensor located?
It is the rear (downstream) sensor, mounted in the exhaust after the catalytic converter.
What does this rear oxygen sensor do?
It generates a voltage signal reflecting the oxygen content in the exhaust after the catalyst, which the ECM uses to monitor catalyst operation.
Which vehicles does ES20045 fit?
It's a direct-fit replacement for the 2001-2002 Chrysler PT Cruiser, 2001-2004 Chrysler Sebring, 2001-2002 Dodge Neon, 2001-2004 Dodge Stratus, 1999-2000 Jeep Grand Cherokee, and 2001 Plymouth Neon.
What are signs this sensor may need replacing?
A check engine light with oxygen-sensor or catalyst-efficiency codes, or reduced fuel economy, can be signs. Diagnose the cause first, since these symptoms can have other sources.
Is this a front or rear sensor?
This is the rear (downstream) oxygen sensor for the listed applications, located after the catalytic converter.
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