diff --git a/esphome/components/sensor/ppd42x.py b/esphome/components/sensor/ppd42x.py
index cd37bd7b4a..2a9fb52950 100644
--- a/esphome/components/sensor/ppd42x.py
+++ b/esphome/components/sensor/ppd42x.py
@@ -18,7 +18,7 @@ CONF_PPD42NS = 'PPD42NS'
 
 PPD42XType = sensor.sensor_ns.enum('PPD42XType')
 PPD42X_TYPES = {
-    CONF_PPD42__: PPD42XType.PPD42_TYPE___,
+    CONF_PPD42__: PPD42XType.PPD42X_TYPE___,
     CONF_PPD42NS: PPD42XType.PPD42X_TYPE_NS,
 }
 
@@ -52,18 +52,18 @@ PLATFORM_SCHEMA = cv.nameable(sensor.PLATFORM_SCHEMA.extend({
 
 def to_code(config):
     rhs = App.make_ppd42x(config[CONF_NAME], PPD42X_TYPES[config[CONF_TYPE]])
-    pms = Pvariable(config[CONF_ID], rhs)
+    ppd = Pvariable(config[CONF_ID], rhs)
     if CONF_PM_2_5 in config:
         conf = config[CONF_PM_2_5]
         for pm_02_5 in get_variable(conf[CONF_PIN]):
             yield
-        sensor.register_sensor(pms.make_pm_2_5_sensor(conf[CONF_NAME]), conf)
+        sensor.register_sensor(ppd.make_pm_02_5_sensor(conf[CONF_NAME]), pm_02_5)
     if CONF_PM_10_0 in config:
         conf = config[CONF_PM_10_0]
         for pm_10_0 in get_variable(conf[CONF_PIN]):
             yield
-        sensor.register_sensor(pms.make_pm_10_0_sensor(conf[CONF_NAME]), conf)
-    setup_component(pms, config)
+        sensor.register_sensor(ppd.make_pm_10_0_sensor(conf[CONF_NAME]), pm_10_0)
+    setup_component(ppd, config)
 
 
 BUILD_FLAGS = '-DUSE_PPD42X'