1# Bluetooth Error Codes 2 3> **NOTE** 4> 5> This topic describes only module-specific error codes. For details about universal error codes, see [Universal Error Codes](errorcode-universal.md). 6 7## 2900001 8 9**Error Message** 10 11Service stopped. 12 13**Description** 14 15The Bluetooth service is stopped, and the APIs related to the Bluetooth service cannot be called. 16 17**Possible Causes** 18 19The Bluetooth service fails to start. 20 21**Solution** 22 23Start the Bluetooth service. 24 25## 2900003 26 27**Error Message** 28 29Bluetooth switch is off. 30 31**Description** 32 33Bluetooth is disabled. 34 35**Possible Causes** 36 37Bluetooth is disabled. 38 39**Solution** 40 41Enable Bluetooth. 42 43## 2900004 44 45**Error Message** 46 47Profile is not supported. 48 49**Description** 50 51The profile is not supported. 52 53**Possible Causes** 54 55The profile is not supported by the device. 56 57**Solution** 58 59Check whether the device supports the profile. Use a profile supported by the device. 60 61## 2900099 62 63**Error Message** 64 65Operation failed. 66 67**Description** 68 69The operation failed. 70 71**Possible Causes** 72 73The profile is not supported by the device. 74 75**Solution** 76 77Perform this operation again. 78 79## 2901000 80 81**Error Message** 82 83Read forbidden. 84 85**Description** 86 87The read operation is not allowed. 88 89**Possible Causes** 90 91The caller does not have the read permission. 92 93**Solution** 94 95Check whether the caller has the read permission. 96 97## 2901001 98 99**Error Message** 100 101Write forbidden. 102 103**Description** 104 105The write operation is not allowed. 106 107**Possible Causes** 108 109The caller does not have the write permission. 110 111**Solution** 112 113Check whether the caller has the write permission. 114 115## 2901054 116 117**Error Message** 118 119IO error. 120 121**Description** 122 123The I/O operation failed. 124 125**Possible Causes** 126 127The I/O transmission is abnormal. 128 129**Solution** 130 131Perform this operation again. 132