2008 XC90 3.2 - Engine Stumbles / Lacks Power / Some Knocking/ Lots of codes

[portugalimports]

Added to the S60 side of the forum recommendation per one of your contributors. Since apparently the XC90 has fewer much fewer views. Here it is:

Volvo XC90 2008 3.2 - 77,000 miles only basic mechanical maintenance until now no significant problems with car before but now ....

Engine Stumbles / Lacks Power / some Knocking/ RPM can run high and engine will lag to change gears.

Recent History
2 Months Ago - Battery Draining and died - Replaced Alternator (possible not compatible aftermarket parts?)

Car ran perfect for a few days then these codes appeared :


P0076 - Intake Valve Control Solenoid Circuit Low Bank 1

P001E - A Camshaft Profile Control Circuit Low Bank 2

P0458 - EVAP System Purge Control Valve A Circuit Low

P0369 - Camshaft Position Sensor B Circuit Intermittent Bank 1

P001B - A Camshaft Profile Control Circuit Low Bank 1

O Reilly shop guys pulled these additional codes also with their scanner.

P1719 - Engine Torque Signal
P061A-62 - Internal Control Module Torque
P06A1- 00 - Variable Air Conditioning Compressor Control Unit

And coincidentally AC went out.

Replaced:

Camshaft Sensor
Crankshaft position sensor
Evap Canister Sensor Wiring - Repaired by splicing cable. Was damaged after alternator repair not properly tied down and heat melted into wiring.

Not sure what to try next, anyone can share some ideas?

[abscate]

Clear all the codes and see what/if comes back. I think a battery disconnect and rest for 15 minutes will clear codes but car will have to re-adapt after, too.

[portugalimports]

Disconnected the battery overnight +12 hours. Started the car and let run a few minutes, no check engine light yet. Drove 10 minutes streets turned off. When turned on the check engine was back, drove 10 minutes on highway. The performance seemed almost flawless no stumbling and was able to accelerate on highway with no issues. (for a day or 2 before the stumbles and other problems started again.) When parked checked the codes and all of those codes are back.

[portugalimports]

Since no additional recommendations from the forum. I took it to my local mechanic have been using for 20 years.
They replaced the Camshaft Position Sensor (Exhaust) and said he repaired some wiring /fuses stuff and now engine lights are gone and surprisingly the ac is working again. Hope this will help someone if come across the issues.

[oragex]

Thanks for the update. You had luck with a good and honest mechanic. The kind of issue not easy to fix

[claymore850]

Thanks a lot, im currently having almost all codes you listed, mine AC isn't working also... 2008 XC90 3.2

[jonesg]

you should start a new thread with all the information....in the correct forum.