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Gen 2 Diesel Turbo Boost Position Sensor (P2598)

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Tparks616

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Discussion starter · #1 ·
Hey guys,
Where do you find your drawings and diagrams at? I'm trying to locate the turbo boost position sensor for cleaning or replacement if necessary. It looks like on the gen 1 it's right on top behind/beside the engine. For the gen 2, I haven't been able to locate it. Any help would be appreciated!
 
#3 ·
#3 maybe. Others name for it per the web page is map sensor.

www.cruzetalk.com

MAP sensor plugged solid- cleaned and reinstalled

2018 Cruze diesel, RS hatchback. 6spd manual. As the title states, my MAP sensor was plugged solid. For a while I’ve been experiencing 1.) Deteriorating fuel economy (nothing drastic but enough to notice). 2.) Feels sluggish. Doesn’t have that pep that it had when new. 3.) Upon cold start...
www.cruzetalk.com www.cruzetalk.com

2017-2019 GM Intake Air Pressure and Temperature Sensor 55593802 GM | GMPartsDirect.com

2017-2019 GM part # 55593802 - Intake Air Pressure and Temperature Sensor
www.gmpartsdirect.com www.gmpartsdirect.com
 
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#5 ·
Tparks616 said:
Hey guys,
Where do you find your drawings and diagrams at? I'm trying to locate the turbo boost position sensor for cleaning or replacement if necessary. It looks like on the gen 1 it's right on top behind/beside the engine. For the gen 2, I haven't been able to locate it. Any help would be appreciated!
Click to expand...

When I get to the shop on Monday I'll research this code. I don't know if it necessarily pertains to the MAP.
 
#6 ·
Goodluckgluck said:
When I get to the shop on Monday I'll research this code. I don't know if it necessarily pertains to the MAP.
Click to expand...
P2598 Code - Turbocharger Boost Control Position Performance Low Position

Possible Causes:
Faulty Turbocharger Control Solenoid Valve
Turbocharger Control Solenoid Valve harness is open or shorted
Turbocharger Control Solenoid Valve circuit poor electrical connection
Faulty Turbocharger Vane Position Sensor
 
#7 ·
Just looked up the code.

It involves verifying a good vacuum supply to the vane pos. Solenoid valve and using a scanner to control the solenoid while checking against the turbo pos. Sensor input.

If you do not have a good scanner or test equipment I would bring this to a reputable diesel shop.
 
Discussion starter · #8 ·
Goodluckgluck said:
Just looked up the code.

It involves verifying a good vacuum supply to the vane pos. Solenoid valve and using a scanner to control the solenoid while checking against the turbo pos. Sensor input.

If you do not have a good scanner or test equipment I would bring this to a reputable diesel shop.
Click to expand...
Thank you, that's helpful! I have $200ish scan tool, not sure if it has that functionality.

So is there a separate turbo vane position sensor or is the CPU figuring the vane position using feedback from the solenoid actuator? I'm just trying to wrap my head around the whole system and figure which components can be replaced.
 
Discussion starter · #9 ·
Alright so the car has been parked all week waiting for a CV axle. Got the axle replaced yesterday and got the cruze back on the road. No issues going to work but while I was on the way home I got the CEL twice with P2598 about 45 minutes apart.

After a little more research this evening I did find a few posts with the same code (P2598) stating that cleaning the map sensor fixed it. I figured I would start there as it's simple, right on top of the motor, and my Cruze is at 110k miles and I've never cleaned it.

The map sensor was nearly a solid block of carbon. A little electronics cleaner got it polished back up. I replaced the upstream NOx sensor back in December but after 20k miles, it was due for cleaning too. I buttoned everything up and took it for a test drive. The cleaning definitely seems to have brought a little pep back. It's more responsive and even sounds better. So far no more trouble codes. I will update this post with any changes
 
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Tparks616
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