P1238 = ECM-6806 Turbocharger (TC) control system flow fault. Flow too low or too high. Permanent/Intermittent fault Diagnostic trouble code (DTC) information Condition If engine speed (RPM) is above 3500 rpm and the engine is operating at a high load, the control signal to the turbocharger (TC) con...

With as many communication problems as you got. I would pull the CEM, clean and check the connectors. Look for Damaged CAN bus cables as you go.

mike3113 wrote: ↑24 Feb 2019, 09:28 Dose the 2002 Volvo C70 T5 have a fuel cut off switch? that is triggered in the event of an accident and if so it there a way of resting it?

Trying from memory: I think it is behind one of the trunks side panels. I also think it is resettable.

Cigarette Lighter sockets and 12V Accessory socket are built to different standards. Look close and your find the differences. Got any blank switch positions on the dash? There are USB chargers that fit in holes designed for rocker switches. https://i.ebayimg.com/images/g/dU4AAOSwbtVZRGQl/s-l500.jpg

10/97 & 10/102 are the floor lights under the dash. Are the floor lights always active, are the bulbs good? If you look at the circuit you 3/100, 3/110 must be normally open when the door is closed, otherwise the floor lights would always be on. If the floor lights are operating as they should, ...

Put somebody else in the driver's seat, get in the back seat and have them take you for a ride.

I would look for wiring defects first. P0571 = Brake pedal position sensor. Either the Brake pedal position sensor or the wiring. P0504 = ECM-510F Vehicle speed signal Diagnostic trouble code (DTC) information Condition Diagnostic trouble code (DTC) ECM-510F (no signal) is stored if there is no comm...

I took mostly everything apart to get to the intake, and when I put it back, it stopped. So I think I took care of it. I think. It's still running a bit rough, but now it's at least drivable. The vacuum hoses are almost 1/4 century old. A lot of small leaks would add up. You might want to get some ...

CIK7 wrote: ↑11 Mar 2019, 19:16 Do yall know of a method to deliver continous power?

Install a Rocker Switch USB port in a blank Rocker Switch position and wire it for continuous power .