maxXAM
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« on: February 04, 2023, 03:47:38 PM »
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17964 - P1556 Charge pressure control; negative deviation. HELP please
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« Last Edit: February 04, 2023, 04:23:26 PM by maxXAM »
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_nameless
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« Reply #1 on: February 04, 2023, 07:21:27 PM »
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17964 - P1556 Charge pressure control; negative deviation. HELP please
With zero relevant info... |
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Giving your mom a tuneup
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nyet
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« Reply #2 on: February 04, 2023, 11:13:17 PM »
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« Last Edit: February 04, 2023, 11:38:27 PM by nyet »
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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maxXAM
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« Reply #3 on: February 05, 2023, 02:46:17 PM »
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i had this issue about week now with no fault codes stored on ecu and my boost guage won't pass 5 psi with no check light on,a friend of mine told me to get hard on my s4 get it under load its will throw codes i take my s4 for spin on highway i hit the gas on 3th gear full throttle suddenly check engine turned on when get to my home pluged in vagcom scanned for cods i found this code 17964 - P1556 Charge pressure control; negative deviation
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nyet
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« Reply #4 on: February 05, 2023, 02:47:40 PM »
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n75, wg lines, wg.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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maxXAM
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« Reply #5 on: February 05, 2023, 03:13:02 PM »
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n75, wg lines, wg.
so this code means over boosting or under boost if over boosting this drive me to start checking boost control starting from n75 to wastegates |
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nyet
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« Reply #6 on: February 05, 2023, 06:33:24 PM »
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overboost -> limp -> limited to 5psi
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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maxXAM
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« Reply #7 on: February 06, 2023, 03:12:24 PM »
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Good news i fixed it
now my s4 hits 20psi again
The check valve that connected between the intake manifold and evap valve was connected backwards
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prj
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« Reply #8 on: February 07, 2023, 05:12:58 AM »
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Everyone loves some boost in their fuel tank.
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nyet
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« Reply #9 on: February 07, 2023, 11:18:13 AM »
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Everyone loves some boost in their fuel tank.
I'm trying to figure out how this led to neg deviation though |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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prj
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« Reply #10 on: February 07, 2023, 11:26:09 AM »
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I'm trying to figure out how this led to neg deviation though If it was 10 years ago when I had the 2.7T hoses memorized in my head, I'd tell ya. |
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maxXAM
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« Reply #11 on: February 07, 2023, 11:50:42 AM »
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I'm trying to figure out how this led to neg deviation though
 that's me, now i know why i smell gas on my s4 capin |
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phila_dot
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« Reply #12 on: February 07, 2023, 06:37:10 PM »
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I'm trying to figure out how this led to neg deviation though
P1556 is LDRA. lde > EDLDRP and lditv_w >= TVLDMX for TDLDRA |
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nyet
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« Reply #13 on: February 07, 2023, 09:19:23 PM »
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P1556 is LDRA.
lde > EDLDRP and lditv_w >= TVLDMX for TDLDRA
Yep, that's overboost... but why did the checkvalve error produce overboost? |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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phila_dot
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« Reply #14 on: February 08, 2023, 03:49:19 PM »
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lde > EDLDRP
Actual boost is at least EDLDRP less than target lditv_w >= TVLDMX
Max DC is unable to correct the error |
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