16804/P0420/001056

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Table Of Contents

1. 16804/P0420/001056 - Catalyst System; Bank 1: Efficiency Below Threshold
- 1.1.1 Possible Causes
- 1.2.1 Possible Solutions

16804/P0420/001056 - Catalyst System; Bank 1: Efficiency Below Threshold

Possible Causes

Oxygen Sensor(s) defective
Oxygen Sensor(s) Control defective

Possible Solutions

Check Oxygen Sensor(s)
Check Oxygen Sensor(s) Control
Perform Oxygen Sensor(s) Aging Check

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