# B1252 on the 2019 Mazda Mazda3

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name B1252

- [10180787](https://open.wenmarpro.com/bulletins/10180787), 2020-10-05: Some customers may experience a "IN\-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored: • B119F:01 TCU \- Tel antenna No. 1 malfunction• B119F:13 \(TCU \- TEL antenna No.1 circuit malfunction\)• B119F:2B \(CMU \- GPS antenna signal circuit malfunction\)• B1252:87 TCU \- Communication error with connectivity master unit \(CMU\)• U0156:00 VCM \- Communication error with connectivity master unit \(CMU\)• U0156:00 BCM \- Communication error with connectivity master unit \(CMU\)• U0198:00 BCM \- Communication error with emergency call unit• U212D:00 BCM \- Communication error with light control module \(RH\)• U3000:00 TCU \- Telematics communication unit internal malfunction• Low Voltage Battery DTCs
- [10177009](https://open.wenmarpro.com/bulletins/10177009), 2020-07-03: Some customers may experience a "IN\-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored:• B119F:01 TCU \- Tel antenna No. 1 malfunction • B119F:13 \(TCU \- TEL antenna No.1 circuit malfunction\) • B119F:2B \(CMU \- GPS antenna signal circuit malfunction\) • B1252:87 TCU \- Communication error with connectivity master unit \(CMU\) • U0156:00 VCM \- communication error with connectivity master unit \(CMU\) • U0156:00 BCM \- Communication error with connectivity master unit \(CMU\) • U0198:00 BCM \- Communication error with emergency call unit • U212D:00 BCM \- Communication error with light control module \(RH\) • U3000:00 TCU \- Telematics communication unit internal malfunction • Low Voltage Battery DTCs
- [10177008](https://open.wenmarpro.com/bulletins/10177008), 2020-07-03: Some customers may experience a "IN\-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored:• B119F:01 TCU \- Tel antenna No. 1 malfunction • B119F:13 \(TCU \- TEL antenna No.1 circuit malfunction\) • B119F:2B \(CMU \- GPS antenna signal circuit malfunction\) • B1252:87 TCU \- Communication error with connectivity master unit \(CMU\) • U0156:00 VCM \- communication error with connectivity master unit \(CMU\) • U0156:00 BCM \- Communication error with connectivity master unit \(CMU\) • U0198:00 BCM \- Communication error with emergency call unit • U212D:00 BCM \- Communication error with light control module \(RH\) • U3000:00 TCU \- Telematics communication unit internal malfunction • Low Voltage Battery DTCs
- [10177007](https://open.wenmarpro.com/bulletins/10177007), 2020-07-03: Some customers may experience a "IN\-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored: • B119F:01 TCU \- Tel antenna No. 1 malfunction • B1252:87 TCU \- Communication error with connectivity master unit \(CMU\) • U0156:00 VCM \- communication error with connectivity master unit \(CMU\) • U0156:00 BCM \- Communication error with connectivity master unit \(CMU\) • U0198:00 BCM \- Communication error with emergency call unit • U212D:00 BCM \- Communication error with light control module \(RH\) • U3000:00 TCU \- Telematics communication unit internal malfunction • Low Voltage Battery DTCs
- [10174625](https://open.wenmarpro.com/bulletins/10174625), 2020-05-05: Some customers may experience a "IN\-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored: • B119F:01 TCU \- Tel antenna No. 1 malfunction • B1252:87 TCU \- Communication error with connectivity master unit \(CMU\) • U0156:00 VCM \- Communication error with connectivity master unit \(CMU\) • U0156:00 BCM \- Communication error with connectivity master unit \(CMU\) • U0198:00 BCM \- Communication error with emergency call unit • U212D:00 BCM \- Communication error with light control module \(RH\) • U3000:00 TCU \- Telematics communication unit internal malfunction • Low Battery DTCs
- [10171791](https://open.wenmarpro.com/bulletins/10171791), 2020-02-27: Some customers may experience a "IN\-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored: B119F:01 TCU \- Tel antenna No. 1 malfunction B1252:87 TCU \- Communication error with connectivity master unit \(CMU\) U0156:00 VCM \- Communication error with connectivity master unit \(CMU\) U0156:00 BCM \- Communication error with connectivity master unit \(CMU\) U0198:00 BCM \- Communication error with emergency call unit U212D:00 BCM \- Communication error with light control module \(RH\) U3000:00 TCU \- Telematics communication unit internal malfunction