TT011907

Technical Tip
01-19-07TT DTC P1A58 NOx Catalytic Converter Regeneration Required
Transaction No:
2057073/4
Release date:
12/13/2019
Condition
ATTENTION:
THIS IS A TECH TIP, NOT A TECHNICAL BULLETIN.
TECH TIPS ARE NOT ASSOCIATED WITH WARRANTY CLAIMING.
Applicable Vehicles
Model(s)
Year
Eng. Code
Trans. Code
VIN Range From
VIN Range To
Jetta, Jetta
Sportwagen,
Beetle Beetle
Convertible, Golf
2009 - 2014
2.0L TDI
(CBEA CJAA)
All
All
All
Revision Table
Instance Number
Published Date
Version Number
Reason For Update
2057073/4
12/13/19
01-19-07TT
Update regeneration
instruction.
2057073/3
11/8/19
01-19-07TT
Update regeneration
instruction.
2057073/2
11/1/19
01-19-07TT
Incorrect Tech Tip number
in title.
2057073/1
10/25/19
01-19-06TT
Original publication.
Technical Background
DTC P1A58 NOx Catalytic Converter Regeneration required.
Service
Before starting NOx catalytic converter regeneration, check thermostat operation: Road test 6 miles on the freeway
and monitor MVB 46/2. If temp drops below 87ºC replace the thermostat. Then perform NOx converter regeneration.
To make sure the desulfurization via regeneration goes as quickly and successfully as possible, please pay attention
to the following:

Guided Functions: Select Adjust learning values for the NOx storage Catalyst Converter.

Drive with constant speed of 70... 120 km/h (40... 75 mph).

To do so, use the Cruise Control if available.

Avoid abrupt accelerations and deceleration, as this prevents correct regeneration of the NOx Storage
Catalyst.

The regeneration takes approx. 40 - 50 minutes.
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Technical Tip
01-19-07TT DTC P1A58 NOx Catalytic Converter Regeneration Required
Transaction No:
2057073/4
Release date:
12/13/2019
Good driving conditions are:

Low-traffic country road/highway

Level roads

Very constant driving cycle

Drive with cruise control

Engine rpm between 1900 - 2400

Select 4th/5th gear (depending on speed)
Poor conditions are:

A lot of traffic / city traffic

Mountain roads

Constant acceleration / braking

Inconsistency with accelerator pedal position.
Additional Information
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rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make
changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or
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