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 ==== | ||
* For 1.8T's experiencing this fault code, this thread may be useful: http://forums.vwvortex.com/ | * For 1.8T's experiencing this fault code, this thread may be useful: http://forums.vwvortex.com/showthread.php?663057 | ||
* Check the [[Official Factory Repair Information]] for any TPI/TSBs that apply to dealer level Engine Controller flash updates for the vehicle in question. | |||
[[Category:Fault Codes]] | [[Category:Fault Codes]] | ||
Latest revision as of 16:00, 19 January 2015
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/showthread.php?663057
- Check the Official Factory Repair Information for any TPI/TSBs that apply to dealer level Engine Controller flash updates for the vehicle in question.