diff --git a/firmware/config/boards/frankenso/compile_frankenso_pal.sh b/firmware/config/boards/frankenso/compile_frankenso_pal.sh
index 79060a6577..60a2d7953d 100644
--- a/firmware/config/boards/frankenso/compile_frankenso_pal.sh
+++ b/firmware/config/boards/frankenso/compile_frankenso_pal.sh
@@ -4,7 +4,6 @@ export EXTRA_PARAMS="-DDUMMY \
  -DDEFAULT_ENGINE_TYPE=FRANKENSO_MIATA_NA6_VAF \
  -DSHORT_BOARD_NAME=frankenso_na6 \
  -DHAL_TRIGGER_USE_PAL=TRUE \
- -DHAL_VSS_USE_PAL=TRUE \
  -DEFI_ICU_INPUTS=FALSE \
  -DHAL_USE_ICU=FALSE \
  -DEFI_LOGIC_ANALYZER=FALSE \
diff --git a/firmware/config/boards/hellen/hellen-nb1/board.mk b/firmware/config/boards/hellen/hellen-nb1/board.mk
index 2ccbacb8c4..ecb5689f83 100644
--- a/firmware/config/boards/hellen/hellen-nb1/board.mk
+++ b/firmware/config/boards/hellen/hellen-nb1/board.mk
@@ -27,7 +27,7 @@ DDEFS += -DTS_NO_PRIMARY -DTS_NO_SECONDARY
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellenNB1\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
 DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
-DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE -DHAL_VSS_USE_PAL=TRUE 
+DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE
 # todo: is it broken?
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
 
diff --git a/firmware/config/boards/hellen/hellen121nissan/board.mk b/firmware/config/boards/hellen/hellen121nissan/board.mk
index 1c62f8e1a7..1b5b1fd28a 100644
--- a/firmware/config/boards/hellen/hellen121nissan/board.mk
+++ b/firmware/config/boards/hellen/hellen121nissan/board.mk
@@ -27,7 +27,7 @@ DDEFS += -DTS_NO_PRIMARY -DTS_NO_SECONDARY
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellen121nissan\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
 DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
-DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE -DHAL_VSS_USE_PAL=TRUE 
+DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE
 # todo: is it broken?
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
 
diff --git a/firmware/config/boards/hellen/hellen121vag/board.mk b/firmware/config/boards/hellen/hellen121vag/board.mk
index bd72c678d9..117d139492 100644
--- a/firmware/config/boards/hellen/hellen121vag/board.mk
+++ b/firmware/config/boards/hellen/hellen121vag/board.mk
@@ -27,7 +27,7 @@ DDEFS += -DTS_NO_PRIMARY -DTS_NO_SECONDARY
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellen121vag\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
 DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
-DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE -DHAL_VSS_USE_PAL=TRUE 
+DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE
 # todo: is it broken?
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
 
diff --git a/firmware/config/boards/hellen/hellen128/board.mk b/firmware/config/boards/hellen/hellen128/board.mk
index 11c016d49a..69b1aa08b4 100644
--- a/firmware/config/boards/hellen/hellen128/board.mk
+++ b/firmware/config/boards/hellen/hellen128/board.mk
@@ -27,7 +27,7 @@ DDEFS += -DTS_NO_PRIMARY -DTS_NO_SECONDARY
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellen128\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
 DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
-DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE -DHAL_VSS_USE_PAL=TRUE 
+DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE
 # todo: is it broken?
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
 
diff --git a/firmware/config/boards/hellen/hellen154hyundai/board.mk b/firmware/config/boards/hellen/hellen154hyundai/board.mk
index 36eaba3b23..5a75961b33 100644
--- a/firmware/config/boards/hellen/hellen154hyundai/board.mk
+++ b/firmware/config/boards/hellen/hellen154hyundai/board.mk
@@ -27,7 +27,7 @@ DDEFS += -DTS_NO_PRIMARY -DTS_NO_SECONDARY
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellen154hyundai\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
 DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
-DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE -DHAL_VSS_USE_PAL=TRUE 
+DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE
 # todo: is it broken?
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
 
diff --git a/firmware/config/boards/hellen/hellen64_miataNA6_94/board.mk b/firmware/config/boards/hellen/hellen64_miataNA6_94/board.mk
index 7a2efbdb73..706e910306 100644
--- a/firmware/config/boards/hellen/hellen64_miataNA6_94/board.mk
+++ b/firmware/config/boards/hellen/hellen64_miataNA6_94/board.mk
@@ -27,7 +27,7 @@ DDEFS += -DTS_NO_PRIMARY -DTS_NO_SECONDARY
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellenNA6\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
 DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
-DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE -DHAL_VSS_USE_PAL=TRUE 
+DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE
 # todo: is it broken?
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
 
diff --git a/firmware/config/boards/hellen/hellen72/board.mk b/firmware/config/boards/hellen/hellen72/board.mk
index a500f6316d..338cd6ca7e 100644
--- a/firmware/config/boards/hellen/hellen72/board.mk
+++ b/firmware/config/boards/hellen/hellen72/board.mk
@@ -27,7 +27,7 @@ DDEFS += -DTS_NO_PRIMARY -DTS_NO_SECONDARY
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellen72\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
 DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
-DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE -DHAL_VSS_USE_PAL=TRUE 
+DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE
 # todo: is it broken?
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
 
diff --git a/firmware/config/boards/hellen/hellen81/board.mk b/firmware/config/boards/hellen/hellen81/board.mk
index 0460d49b98..a0b97e90d4 100644
--- a/firmware/config/boards/hellen/hellen81/board.mk
+++ b/firmware/config/boards/hellen/hellen81/board.mk
@@ -30,8 +30,8 @@ DDEFS += -DTS_NO_PRIMARY -DTS_NO_SECONDARY
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellen81\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
 #DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
-#DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE -DHAL_VSS_USE_PAL=TRUE
-DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_ADC=TRUE -DHAL_VSS_USE_PAL=TRUE
+#DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE
+DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_ADC=TRUE
 # todo: is it broken?
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
 
diff --git a/firmware/config/boards/hellen/hellen88bmw/board.mk b/firmware/config/boards/hellen/hellen88bmw/board.mk
index 9b7e6cfff5..7ec4e966ad 100644
--- a/firmware/config/boards/hellen/hellen88bmw/board.mk
+++ b/firmware/config/boards/hellen/hellen88bmw/board.mk
@@ -27,7 +27,7 @@ DDEFS += -DTS_NO_PRIMARY -DTS_NO_SECONDARY
 # Add them all together
 DDEFS += -DEFI_USE_OSC=TRUE -DFIRMWARE_ID=\"hellen88bmw\" $(DEFAULT_ENGINE_TYPE) $(LED_CRITICAL_ERROR_BRAIN_PIN) $(LED_COMMUNICATION_BRAIN_PIN)
 DDEFS += -DEFI_SOFTWARE_KNOCK=TRUE -DSTM32_ADC_USE_ADC3=TRUE
-DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE -DHAL_VSS_USE_PAL=TRUE 
+DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE
 # todo: is it broken?
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
 
diff --git a/firmware/config/boards/proteus/board.mk b/firmware/config/boards/proteus/board.mk
index cf32dadf5f..fb9366ebef 100644
--- a/firmware/config/boards/proteus/board.mk
+++ b/firmware/config/boards/proteus/board.mk
@@ -21,8 +21,6 @@ DDEFS += -DEFI_MAIN_RELAY_CONTROL=TRUE
 
 DDEFS += -DEFI_ICU_INPUTS=FALSE -DHAL_TRIGGER_USE_PAL=TRUE
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
-# todo: refactor HAL_VSS_USE_PAL
-DDEFS += -DHAL_VSS_USE_PAL=TRUE
 
 # This stuff doesn't work on H7 yet
 ifneq ($(PROJECT_CPU),ARCH_STM32H7)
diff --git a/firmware/config/boards/subaru_eg33/board.mk b/firmware/config/boards/subaru_eg33/board.mk
index f1901ecd12..309463d55e 100644
--- a/firmware/config/boards/subaru_eg33/board.mk
+++ b/firmware/config/boards/subaru_eg33/board.mk
@@ -27,7 +27,6 @@ DDEFS += -DDEFAULT_ENGINE_TYPE=SUBARUEG33_DEFAULTS
 DDEFS += -DHAL_TRIGGER_USE_PAL=TRUE
 DDEFS += -DEFI_ICU_INPUTS=FALSE
 DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
-DDEFS += -DHAL_VSS_USE_PAL=TRUE
 
 DDEFS += -DHAL_USE_UART=FALSE
 DDEFS += -DUART_USE_WAIT=FALSE
diff --git a/firmware/config/stm32f4ems/efifeatures.h b/firmware/config/stm32f4ems/efifeatures.h
index e480137090..2199b15d22 100644
--- a/firmware/config/stm32f4ems/efifeatures.h
+++ b/firmware/config/stm32f4ems/efifeatures.h
@@ -82,10 +82,6 @@
 #define HAL_TRIGGER_USE_ADC FALSE
 #endif /* HAL_TRIGGER_USE_ADC */
 
-#ifndef HAL_VSS_USE_PAL
-#define HAL_VSS_USE_PAL FALSE
-#endif /* HAL_VSS_USE_PAL */
-
 /**
  * TunerStudio support.
  */
diff --git a/firmware/config/stm32h7ems/efifeatures.h b/firmware/config/stm32h7ems/efifeatures.h
index 1e78c2e09c..5bfbde88c6 100644
--- a/firmware/config/stm32h7ems/efifeatures.h
+++ b/firmware/config/stm32h7ems/efifeatures.h
@@ -45,9 +45,6 @@
 #undef EFI_LOGIC_ANALYZER
 #define EFI_LOGIC_ANALYZER FALSE
 
-#undef HAL_VSS_USE_PAL
-#define HAL_VSS_USE_PAL TRUE
-
 #undef LUA_USER_HEAP
 #define LUA_USER_HEAP 100000
 #undef LUA_SYSTEM_HEAP
diff --git a/simulator/simulator/efifeatures.h b/simulator/simulator/efifeatures.h
index f0e6e07a65..f1f26ec364 100644
--- a/simulator/simulator/efifeatures.h
+++ b/simulator/simulator/efifeatures.h
@@ -109,10 +109,6 @@
 #define HAL_TRIGGER_USE_PAL FALSE
 #endif /* HAL_TRIGGER_USE_PAL */
 
-#ifndef HAL_VSS_USE_PAL
-#define HAL_VSS_USE_PAL FALSE
-#endif /* HAL_VSS_USE_PAL */
-
 #ifndef HAL_TRIGGER_USE_ADC
 #define HAL_TRIGGER_USE_ADC FALSE
 #endif /* HAL_TRIGGER_USE_ADC */