Long term fuel trim

[racer512]

We have 2001 996 Turbo that keeps, throwing po410 p4011 secondary air faults. Replaced all the normal parts, vacuum system is tight etc . We have noticed while scanning the (4-6) O2 sensor bank two there is no long term signal displayed my scan tool shows a Mil volt signal of -110.97 on the 4-6 bank only. the (1-3) bank shows a flutching number -0.3 to 0.2 wiring checks out with an Ohmmeter so The Ecu is open? 

Since the ecu monitors the O2 sensors to see if the secondary air is working  and there is no signal from Bank two it sets the code? 

 

Anyone know where I can the ECU/DME tested.

[JFP in PA]

1 hour ago, racer512 said:

We have 2001 996 Turbo that keeps, throwing po410 p4011 secondary air faults. Replaced all the normal parts, vacuum system is tight etc . We have noticed while scanning the (4-6) O2 sensor bank two there is no long term signal displayed my scan tool shows a Mil volt signal of -110.97 on the 4-6 bank only. the (1-3) bank shows a flutching number -0.3 to 0.2 wiring checks out with an Ohmmeter so The Ecu is open? 

Since the ecu monitors the O2 sensors to see if the secondary air is working  and there is no signal from Bank two it sets the code? 

 

Anyone know where I can the ECU/ DME tested.

 

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