Nox sensor or add blue?

1968RT

Member
Joined
Jan 13, 2024
Location
Wisconsin
TDI
2013 CKRA Passat
2013 CKRA setting codes
P2200 Nox Sensor Bank 1 Sensor 1 Circuit
P2209 Nox Sensor Heater sense Bank 1 Sensor 1 Circuit Range Performance

5 wire plug had been replaced at some point, so I cut off the splices & soldered them. sealed with dual wall shrink wrap them to rule that out.
Wires all looked fine, with clean copper leads. connection point at the module was clean & no evidence of corrosion.
Will throw the codes usually with in 30 minutes of highway driving pretty consistently. Running fine otherwise.
Guessing this could be an def injection issue just as easily as being a bad sensor?

Thoughts or common tests to rule out one or the other?

Thanks in advance
 

privateTDIjet

Well-known member
Joined
Jun 21, 2022
Location
Montreal, Canada
TDI
2009 Jetta 2.0 TDI and 2014 Passat 2.0 TDI / Ive got a MK5 bentley manual, message me for a free diagram
Off the top of my head I didnt have a code exactly like yours (electrical fault in circuit) but same situation where it would take 30 minutes for the light to come back on. Replaced it with a sensor from ebay and it went away. Wires also looked fine in mine and the underbody was relatively clean.

If you are gonna change it out, tighten that plastic cover back on tight... mine randomly fell out 2 weeks later
 

1968RT

Member
Joined
Jan 13, 2024
Location
Wisconsin
TDI
2013 CKRA Passat
Do you recall what brand sensor you purchased? I see them from $150 to $550. Don't want to throw money away on one that resembles the
part, but doesn't work, However $550? Thats a bit extreme imo.
 

privateTDIjet

Well-known member
Joined
Jun 21, 2022
Location
Montreal, Canada
TDI
2009 Jetta 2.0 TDI and 2014 Passat 2.0 TDI / Ive got a MK5 bentley manual, message me for a free diagram
Do you recall what brand sensor you purchased? I see them from $150 to $550. Don't want to throw money away on one that resembles the
part, but doesn't work, However $550? Thats a bit extreme imo.
Its chinese. The seller on ebay is cmpafte_4 and it cost me 98.19 USD + shipping. Its marked as compatible but it actually came slightly shorter than the original, making the wires stretch a bit more to reach the connections.
 
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