Scotty. Greeting from Newport, Rhode Island. I enjoy your youtube videos, so glad to find this…

skalble

Scotty. Greeting from Newport, Rhode Island. I enjoy your youtube videos, so glad to find this website. I have a 2001 Volvo V70 t5 turbo wagon with 176,000 miles. The other day after a heavy rain, I started the car and there was no power, RPMs less than 2000, NO "Check Engine Light". I got a message: Engine System Service Urgent, in the message board and a "yellow" triangle. I barely limped home and looked up what was going on. I also hit the READ button and hit the trip button and got a code: 77. (I can't seem to find out too much on the code: 77) I contacted my mechanic and he said it might be the ETM (electronic throttle) since Volvo's are notorious for them to fail. He suggest I take it out and give it a good cleaning with CRC Throttle Body & Air Intake Cleaner to see if that helps before we look into replacing the ETM, which can be costly!!! Volvo doesn't make it too easy to remove the ETM, but I got it out and cleaned it up really good. (I understand that the two ends of the modular has the electronics for the unit and they generally are the things that go bad. I didn't take them apart for fear if screwing them up totally). I put it back in and started up the car and to ran great. The message board was clear and the RPMs were good. I took it around the block a few times and there seem to be working fine. All through the day I went out and check the car and it worked fine. I patted myself of the back thinking I saved myself a large repair bill. This morning I went to start the car and BANG. I was back to the same problem but worst. The message: Engine System Service Urgent was back on and the car barely would stay running, RPMs would fluctuate from 700 to 1500 and the car would stall. An hour later, I started up the car and it seems fine with RMSs steady but the message: Engine system Service Urgent is on and I still get a code: 77. My question is: 1. What the heck is the code: 77? 2. Should I have opened up the two ends of the modular to clean the contacts when I had it out? I really don't want to take this unit out of the car again. I will if I have too. 3. Does it look like I'm going to have to get a new ETM? 4. Should I have cleaned out the Mass Air Flow Sensor while I'm at it too? Does this go hand in hand with the ETM cleaning? I understand you just can't just go out and get a unit, it needs to be "cloned" or programmed to this car. We're talking $500 to $600 just for the part. What's your take on this issue. I'm trying to stay away from a $1000 plus repair job. BTW: The sticker on the unit is "white". I understand that this means it's the original part (replacement units have a "yellow" sticker").

Yours Truly Steven Kalble

Comments (3)
No. 1-3
skalble
skalble

I took out the Mass Air Sensor and gave that a major cleaning too. Since one of Scotty's videos suggested to clean both at the same time would helpful. The car runs much better and the Engine System Service Urgent light is off. The RPMs are running smooth and steady now. So far so good. I will keep Robert in mind in the future. Thanks

skalble
skalble

I've been familiar with Robert. I'll check him out. Thanks.

Techsus
Techsus

DIY Robert is the go-to for all things Volvo. Super nice guy: https://www.robertspinner.com/parts_services.htm