How To Repair iPhone 16 Pro Max Fake Temp Warning: Difference between revisions

How To Repair iPhone 16 Pro Max Fake Temp Warning
Device	iPhone 16 Pro, iPhone 16 Pro Max
Affects part(s)	Main Logic Board
Needs equipment	Soldering Iron, Microscope, Solder Paste, Jumper Wire
Difficulty	◉◉◉◌ Hard
Type	Soldering

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Latest revision as of 19:16, 27 December 2025

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Problem description

iPhone 16 Pro / 16 Pro Max displays a “Temperature Too High” warning immediately on boot or shortly after connecting a charger, even though the device is physically cool and shows no real thermal rise.

Symptoms

“Temperature Too High” warning on screen
Device refuses to charge or throttles charging
Issue appears instantly, even on a cold device
No abnormal current draw on DCPS
No actual heating of CPU, PMIC, or battery
Problem persists after:
- Battery replacement
- Charging port replacement
- iOS restore

Solution

Diagnostic Steps

Confirm device is physically cool
Measure current draw (should be normal / idle)
Measure voltage at gpio_aop_from_baro_int_l
- ❌ ~0.8–0.9 V → fault confirmed
Locate pp1v8_s2_dock_conn
Verify donor rail is clean and stable before proceeding

Repair Steps

Disconnect battery
Identify gpio_aop_from_baro_int_l
Identify pp1v8_s2_dock_conn
Solder a 1 kΩ resistor in series with a fine jumper wire
Connect:
- One side of resistor → 1.8 V source
- Other side → affected dock FPC signal pad
Secure jumper to prevent movement or shorts
Reconnect battery and power on device

@@ Line 8: / Line 8: @@
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 == Problem description ==
-<!--
+iPhone 16 Pro / 16 Pro Max displays a “Temperature Too High” warning immediately on boot or shortly after connecting a charger, even though the device is physically cool and shows no real thermal rise.
-Provide a concise description of the issue here. Be  as specific as possible to help readers quickly determine whether or not this is the exact problem they are facing.
+[[File:Fake-temp-warning-16p.webp|thumb|iPhone 16 Pro/Max Temp. Warning]]
- -->
-[[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
 == Symptoms ==
-<!--
-Detail all measurable or observable symptoms in this section.
--->
-* Symptom 1 (Figure 1)
-* Symptom 2
-== Solution ==
+* “Temperature Too High” warning on screen
-<!--
+* Device refuses to charge or throttles charging
-If the issue has a single, specific solution, provide it in this section and delete the sub-headers below. Otherwise, if there are multiple potential causes for the problem, outline the process of identifying the root cause and offer corresponding solutions below.
+* Issue appears instantly, even on a cold device
+* No abnormal current draw on DCPS
--->
+* No actual heating of CPU, PMIC, or battery
+* Problem persists after:
+** Battery replacement
+** Charging port replacement
+** iOS restore
+[[File:Fake-temp-boardview-16p.png|thumb]]
+== Solution ==
+[[File:Fake-temp-board-16p.png|thumb]]
 === Diagnostic Steps ===
+# Confirm device is physically cool
+# Measure current draw (should be normal / idle)
+# Measure voltage at gpio_aop_from_baro_int_l
+#* ❌ ~0.8–0.9 V → fault confirmed
+# Locate pp1v8_s2_dock_conn
+# Verify donor rail is clean and stable before proceeding<br />
+=== Repair Steps ===
-=== Repair Steps ===
+# Disconnect battery
+# Identify gpio_aop_from_baro_int_l
+# Identify pp1v8_s2_dock_conn
+# Solder a 1 kΩ resistor in series with a fine jumper wire
+# Connect:
+#* One side of resistor → 1.8 V source
+#* Other side → affected dock FPC signal pad
+# Secure jumper to prevent movement or shorts
+# Reconnect battery and power on device