B1202
Diagnosis Sensor Unit
B1202 is an OBD-II diagnostic trouble code meaning: Diagnosis Sensor Unit. Common causes: malfunction of the srs diagnostic unit, open or short circuit in wiring harness. Estimated repair cost: $111–333.
Symptoms
- Airbag light is on
- The passive safety system is not activated during testing
- Lack of reaction of belt pretensioners during emergency braking
Causes
- Malfunction of the SRS diagnostic unit
- Open or short circuit in wiring harness
- Corrosion of block connector contacts
- Problems with power supply or module ground
- Diagnostic unit software failure
How to Fix
- Check SRS system fault codes with a scanner
- Inspect the connectors and wiring harness of the diagnostic unit
- Check the power supply and ground of the module
- If necessary, replace the diagnostic unit
- Reset errors and test the system
Related codes
FAQ
What does the B1202 code mean?
B1202 is an OBD-II diagnostic trouble code that indicates: Diagnosis Sensor Unit
What causes a B1202 error code?
The most common causes of B1202 include: Malfunction of the SRS diagnostic unit; Open or short circuit in wiring harness; Corrosion of block connector contacts; Problems with power supply or module ground.
How do I fix a B1202 diagnostic trouble code?
To fix B1202: Check SRS system fault codes with a scanner. Inspect the connectors and wiring harness of the diagnostic unit. Check the power supply and ground of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1202?
Do not drive — repair immediately
How much does it cost to fix B1202?
The estimated repair cost for B1202 is $111–333. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat