OBD Guide
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B1273

Sliding Roof ECU Communication Stop

B1273 is an OBD-II diagnostic trouble code meaning: Sliding Roof ECU Communication Stop. Common causes: open/short circuit in wiring harness, malfunction of the sunroof control unit. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Sunroof/sliding roof not working
  • Fault indication on the instrument panel
  • The hatch can freeze in one position

Causes

  • Open/short circuit in wiring harness
  • Malfunction of the sunroof control unit
  • Poor contact in connectors
  • Blown fuse
  • Problems with power or ground of the control unit
  • Software error in ECU

How to Fix

  1. Check the fuse of the corresponding circuit
  2. Inspect the wiring harness for damage
  3. Check the quality of contacts in the connectors
  4. Check the power and ground of the sunroof control unit
  5. Scan the control unit for other errors
  6. If necessary, replace the control unit or reflash it

Related codes

B1270B1271B1272U1000

FAQ

What does the B1273 code mean?

B1273 is an OBD-II diagnostic trouble code that indicates: Sliding Roof ECU Communication Stop

What causes a B1273 error code?

The most common causes of B1273 include: Open/short circuit in wiring harness; Malfunction of the sunroof control unit; Poor contact in connectors; Blown fuse.

How do I fix a B1273 diagnostic trouble code?

To fix B1273: Check the fuse of the corresponding circuit. Inspect the wiring harness for damage. Check the quality of contacts in the connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1273?

Limited driving only, diagnose soon

How much does it cost to fix B1273?

The estimated repair cost for B1273 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat