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Codes P0023 and P1902?

Tiny
SHARP_CHRISTINA18
  • MEMBER
  • 2006 GMC ENVOY
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 155,000 MILES
Hello! I just recently changed my alternator, battery, throttle body, and ABS wheel speed sensor! I’ve been able to drive my vehicle listed above Denali, but then it will randomly just power down. I hooked it up to the scanner and got a P0023 “Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Bank 2” and P1902 “Exhaust Gas Temperature Sensor Voltage” I’ve been digging trying to figure out repair information and only find for a 4.3 engine which I have a 5.3! Anyone have any ideas?
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Saturday, April 8th, 2023 AT 4:39 PM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,958 POSTS
The P0023 can cause the P1902 code so let's concentrate on fixing that one. Since the error code is a circuit failure. I need to confirm the engine size though because the 5.3 does not have an Exhaust Camshaft Position Actuator Solenoid Valve? So, can you please double check for me?
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Monday, April 10th, 2023 AT 10:05 AM
Tiny
SHARP_CHRISTINA18
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  • 3 POSTS
It’s definitely a 5.3 engine, that’s why it’s super weird that it’s throwing the code in the first place & it’s stored in the lift gate module.
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Monday, April 10th, 2023 AT 10:08 AM
Tiny
KEN L
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  • 47,958 POSTS
It could be a false positive, let's clear the codes to see what happens. How does the car seem to run?

Please follow this video to clear the codes:

https://youtu.be/ahK_eucFi-k

Please go over this guide and report back.

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Tuesday, April 11th, 2023 AT 10:37 AM
Tiny
SHARP_CHRISTINA18
  • MEMBER
  • 3 POSTS
I’ve cleared the codes multiple times. It just still shuts off randomly. From researching I’ve found that these trucks seem to have problems with the fuse boxes under the hood so I’m going to be replacing it to see if it helps.
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Tuesday, April 11th, 2023 AT 10:39 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,958 POSTS
Okay, I would also service the throttle body, this guide can help:

https://www.2carpros.com/articles/throttle-actuator-service

Please go over this guide and report back.

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Thursday, April 13th, 2023 AT 9:40 AM

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