I have a Topdon Diagnostic tool to read DTCs, monitor operating conditions, perform diagnostic tests and reset DTCs when a problem / issue is corrected.
I have had both P003A and P2599 DTC codes trip the MIL light several times in the past 2 weeks - recorded as Turbo Vane Position Learn Pass & Failure. Eventually, the MIL lamp resets (after 20 successful vane position learn events). In each case, no towing/heavy load situation - once on startup, twice while driving at highway speed (60-65mph) on level road (as is most of Minnesota's highways). No other DTCs or abnormal items found during system component scans/DTC interrogations. The truck has 167,000 miles - 80% of which are highway speed (60 mph or higher). This is my second Duramax.
Diagnostic procedure for P003A indicates correcting P2559 condition first.
Information gathered from scan tool:
- Operating conditions (freeze frame data) is normal / expected - everything is within standard operating parameters.
- Monitoring the Desired Vane Position and Vane Position Sensor data (and graphs) while driving in town (0-35 mph) and highway speeds (55-75 mph), both the desired and sensed positions track very tightly - very minimal variance until an acceleration, load (slight uphill/downhill) or deceleration condition occur...then the desired position change value slightly leads the sensed position, but it's only momentary (expected behavior). The Sensed Position catches up immediately.
- Vane position sensor voltage is also operating within normal/established min/max values, and the graph line tracks very tightly with the position graph lines.
- Commanding the "Learn Procedure" to increase and decrease vane positions (during idle) by 10% increments up to and back down from 100% completes successfully.
I am aware there are 4 general conditions that set these 2 codes:
- Problems with the Vane Position Sensor
- Problems with the Vane Position Solenoid
- Sticky Turbo Vanes
- Electrical Connection (damaged wires / faulty connections)
I have acquired both the OEM replacement sensor and solenoid. The sensor is a relatively easy task, whereas the solenoid is a little 'more involved' activity. However, I don't particularly care for 'rip and replace' by 'trial and failure" methods since the DTCs self-cleared and commanding vane position learn tests have passed. Also, I'm not terribly excited about the idea of removing the Turbo to examine the vanes -especially if this is not a high-frequency condition - due to the intrusiveness and effort just weeks before I'll be driving a long distance (2k miles round trip).
Looking for insights, advice, experience with similar conditions before just 'diving in head-first'.
I have had both P003A and P2599 DTC codes trip the MIL light several times in the past 2 weeks - recorded as Turbo Vane Position Learn Pass & Failure. Eventually, the MIL lamp resets (after 20 successful vane position learn events). In each case, no towing/heavy load situation - once on startup, twice while driving at highway speed (60-65mph) on level road (as is most of Minnesota's highways). No other DTCs or abnormal items found during system component scans/DTC interrogations. The truck has 167,000 miles - 80% of which are highway speed (60 mph or higher). This is my second Duramax.
Diagnostic procedure for P003A indicates correcting P2559 condition first.
Information gathered from scan tool:
- Operating conditions (freeze frame data) is normal / expected - everything is within standard operating parameters.
- Monitoring the Desired Vane Position and Vane Position Sensor data (and graphs) while driving in town (0-35 mph) and highway speeds (55-75 mph), both the desired and sensed positions track very tightly - very minimal variance until an acceleration, load (slight uphill/downhill) or deceleration condition occur...then the desired position change value slightly leads the sensed position, but it's only momentary (expected behavior). The Sensed Position catches up immediately.
- Vane position sensor voltage is also operating within normal/established min/max values, and the graph line tracks very tightly with the position graph lines.
- Commanding the "Learn Procedure" to increase and decrease vane positions (during idle) by 10% increments up to and back down from 100% completes successfully.
I am aware there are 4 general conditions that set these 2 codes:
- Problems with the Vane Position Sensor
- Problems with the Vane Position Solenoid
- Sticky Turbo Vanes
- Electrical Connection (damaged wires / faulty connections)
I have acquired both the OEM replacement sensor and solenoid. The sensor is a relatively easy task, whereas the solenoid is a little 'more involved' activity. However, I don't particularly care for 'rip and replace' by 'trial and failure" methods since the DTCs self-cleared and commanding vane position learn tests have passed. Also, I'm not terribly excited about the idea of removing the Turbo to examine the vanes -especially if this is not a high-frequency condition - due to the intrusiveness and effort just weeks before I'll be driving a long distance (2k miles round trip).
Looking for insights, advice, experience with similar conditions before just 'diving in head-first'.
