Google Diagnostics & Fault Manuals
Designer of Google Pixel 9 Pro Fold and Tensor G4 on-device machine intelligence silicon.
Equipment Models
Hardware families produced by Google
Pixel 9 Pro
4 guidesClass: Flagship Smartphones Equipment
Pixel 9 Pro Fold
0 guidesClass: Dual-Display Foldable Phone (Tensor G4)
Pixel 9 Pro Fold
0 guidesClass: Dual-Display Foldable Phone (Tensor G4)
Pixel 9 Pro Fold
0 guidesClass: Dual-Display Foldable Phone (Tensor G4)
Pixel 9 Pro Fold
0 guidesClass: Dual-Display Foldable Phone (Tensor G4)
Pixel 9 Pro Fold
0 guidesClass: Dual-Display Foldable Phone (Tensor G4)
Pixel 9 Pro Fold
0 guidesClass: Dual-Display Foldable Phone (Tensor G4)
Pixel 9 Pro XL
5 guidesClass: Flagship Smartphones Equipment
Indexed Error Codes for Google
Machine-verified error code diagnostic walkthroughs
Pixel 9 Pro Telephoto Freeze
The camera hardware abstraction layer (HAL) encountered a timeout or out-of-range ADC read from the 5x periscope telephoto Optical Image Stabilization (OIS) Hall effect sensor. The camera daemon terminates stream processing to prevent voice coil motor (VCM) driver overload, causing the viewfinder to freeze on 5x zoom switch.
Periscope Telephoto OIS Actuator Freeze
Hardware-level camera subsystem fault triggered when the Camera HAL detects zero Hall-sensor feedback from the folded periscope OIS voice coil motor (VCM), locking the camera service to prevent driver IC thermal runaway.
Virtual A/B Bootloop After OTA
During an Over-The-Air (OTA) update, Android Virtual A/B (snapshot-based updates) failed during dynamic partition staging or cow_snapuserd snapshot merge operations. The primary bootloader (ABL) detected an invalid or corrupted snapshot state in metadata, safely aborting boot and falling back to fastboot mode.
USB-C Audio and Charging Fault
The Pixel 9 Pro's Power Delivery (PD) controller and PMIC have tripped hardware protection latches. Electrolytic contamination, particulate debris, or pin shorting across CC1/CC2 and VBUS lines triggered impedance mismatches, forcing the device into an autonomous loop disabling analog audio accessory mode and pausing high-current charging.
Qi2 Wireless Charging Thermal Disconnect
The internal PMIC (Power Management IC) and battery management system (BMS) trigger an autonomous wireless power transfer disconnect when the secondary Rx induction coil or battery temperature exceeds 43°C to 45°C. This safety lock initiates a thermal shutdown warning to protect lithium-ion pouch cells from thermal degradation.
Flashing Red Battery Thermal Throttling
The fuel gauge IC and battery management system (BMS) have triggered an over-temperature protection cutoff (>45°C pack temperature or >60°C connector/PMIC temperature). Charging terminates immediately to prevent thermal runaway, asserting a kernel battery safety flag and presenting a flashing red battery icon.
Pixel Battery Disconnected Error
Error USB_CHG_ERR_0x44 indicates a fuel gauge communication breakdown or battery thermistor line open-circuit on the I2C/HDQ bus, causing the Power Delivery Controller to halt charging to prevent thermal runaway.
USB-PD Thermal Charging Cutoff
The Power Delivery (PD) charging controller triggered ERR_THERMAL_CHG_LIMIT after onboard battery thermistors or PMIC thermal sensors breached the safety threshold (typically >43°C during 37W PPS charging). The charge IC automatically drops current or disconnects VBUS to prevent lithium plating and thermal runaway.
Corner Touch Unresponsiveness Fix
The Goodix/Synaptics touch IC firmware edge-suppression algorithm misclassifies valid corner tap events as accidental palm contact, exacerbated by outdated panel firmware or out-of-spec SPI polling rates.