16804/P0420/001056: Difference between revisions
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==== Possible Causes ==== | ==== Possible Causes ==== | ||
* Oxygen Sensor(s) | * Leakage in Intake and/or Exhaust System | ||
* Oxygen Sensor(s) Control | * Catalyst faulty | ||
* Oxygen Sensor(s) faulty | |||
* Oxygen Sensor(s) Control faulty | |||
==== Possible Solutions ==== | ==== Possible Solutions ==== | ||
* Check Intake and Exhaust System for Leaks | |||
* Check Catalyst | |||
* Check Oxygen Sensor(s) | * Check Oxygen Sensor(s) | ||
* Check Oxygen Sensor(s) Control | * Check Oxygen Sensor(s) Control | ||
* Perform Oxygen Sensor(s) Aging Check | ** Perform Oxygen Sensor(s) Aging Check | ||
==== Special Notes ==== | ==== Special Notes ==== | ||
Revision as of 22:34, 15 April 2008
16804/P0420/001056 - Catalyst System; Bank 1: Efficiency Below Threshold
Possible Causes
- Leakage in Intake and/or Exhaust System
- Catalyst faulty
- Oxygen Sensor(s) faulty
- Oxygen Sensor(s) Control faulty
Possible Solutions
- Check Intake and Exhaust System for Leaks
- Check Catalyst
- Check Oxygen Sensor(s)
- Check Oxygen Sensor(s) Control
- Perform Oxygen Sensor(s) Aging Check
Special Notes
- For 1.8T's experiencing this fault code, this thread may be useful: http://forums.vwvortex.com/zerothread?id=663057