diff --git a/firmware/controllers/algo/obd_error_codes.h b/firmware/controllers/algo/obd_error_codes.h
index c59df7107a..112e3e3697 100644
--- a/firmware/controllers/algo/obd_error_codes.h
+++ b/firmware/controllers/algo/obd_error_codes.h
@@ -1,6 +1,6 @@
 /**
  * @file obd_error_codes.h
- * @brief Standart and custom OBD-II error codes
+ * @brief Standard and custom OBD-II error codes
  *
  * More info at http://www.obd-codes.com/faq/obd2-codes-explained.php
  *
@@ -1714,10 +1714,10 @@ enum class ObdCode : uint16_t {
 
 	CUSTOM_6010 = 6010,
 	CUSTOM_6011 = 6011,
-	CUSTOM_INTEPOLATE_ERROR = 6012,
-	CUSTOM_INTEPOLATE_ERROR_2 = 6013,
-	CUSTOM_INTEPOLATE_ERROR_3 = 6014,
-	CUSTOM_INTEPOLATE_ERROR_4 = 6015,
+	CUSTOM_ERR_INTERPOLATE_1 = 6012,
+	CUSTOM_ERR_INTERPOLATE_2 = 6013,
+	CUSTOM_ERR_INTERPOLATE_3 = 6014,
+	CUSTOM_ERR_INTERPOLATE_4 = 6015,
 	CUSTOM_PARAM_RANGE = 6016,
 	CUSTOM_MAF_NEEDED = 6017,
 	CUSTOM_UNKNOWN_ALGORITHM = 6018,
diff --git a/firmware/util/math/interpolation.cpp b/firmware/util/math/interpolation.cpp
index 51b03564a5..543bf1cd8e 100644
--- a/firmware/util/math/interpolation.cpp
+++ b/firmware/util/math/interpolation.cpp
@@ -73,11 +73,11 @@ static void testBinary() {
  */
 float interpolateMsg(const char *msg, float x1, float y1, float x2, float y2, float x) {
 	if (cisnan(x1) || cisnan(x2) || cisnan(y1) || cisnan(y2)) {
-		warning(ObdCode::CUSTOM_INTEPOLATE_ERROR, "interpolate%s: why param", msg);
+		warning(ObdCode::CUSTOM_ERR_INTERPOLATE_1, "interpolate%s: why param", msg);
 		return NAN;
 	}
 	if (cisnan(x)) {
-		warning(ObdCode::CUSTOM_INTEPOLATE_ERROR, "interpolate%s: why X", msg);
+		warning(ObdCode::CUSTOM_ERR_INTERPOLATE_2, "interpolate%s: why X", msg);
 		return NAN;
 	}
 	// todo: double comparison using EPS
@@ -85,7 +85,7 @@ float interpolateMsg(const char *msg, float x1, float y1, float x2, float y2, fl
 		/**
 		 * we could end up here for example while resetting bins while changing engine type
 		 */
-		warning(ObdCode::CUSTOM_INTEPOLATE_ERROR, "interpolate%s: Same x1 and x2 in interpolate: %.2f/%.2f", msg, x1, x2);
+		warning(ObdCode::CUSTOM_ERR_INTERPOLATE_3, "interpolate%s: Same x1 and x2 in interpolate: %.2f/%.2f", msg, x1, x2);
 		return NAN;
 	}
 
@@ -94,7 +94,7 @@ float interpolateMsg(const char *msg, float x1, float y1, float x2, float y2, fl
 //	efiAssertVoid(ObdCode::CUSTOM_ERR_ASSERT_VOID, x1 != x2, "no way we can interpolate");
 	float a = INTERPOLATION_A(x1, y1, x2, y2);
 	if (cisnan(a)) {
-		warning(ObdCode::CUSTOM_INTEPOLATE_ERROR, "interpolate%s: why a", msg);
+		warning(ObdCode::CUSTOM_ERR_INTERPOLATE_4, "interpolate%s: why a", msg);
 		return NAN;
 	}
 	float b = y1 - a * x1;