OBD Guide
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U1203

Invalid Or Missing Data For Windows

U1203 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Windows. Common causes: broken wires in the door harness, malfunction of the power window control module. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Power windows don't work
  • Intermittent operation of electric windows
  • The malfunction indicator on the instrument panel is on
  • The error is stored in the ECU memory

Causes

  • Broken wires in the door harness
  • Malfunction of the power window control module
  • Problems with connection connectors
  • Short circuit in the circuit
  • ECU software error

How to Fix

  1. Check the integrity of the wiring harness in the doors
  2. Inspect the connection connectors for oxidation
  3. Scan the system for other errors
  4. Check the power and ground of the control module
  5. If necessary, replace the power window control module

Related codes

U1200U1201U1202

FAQ

What does the U1203 code mean?

U1203 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Windows

What causes a U1203 error code?

The most common causes of U1203 include: Broken wires in the door harness; Malfunction of the power window control module; Problems with connection connectors; Short circuit in the circuit.

How do I fix a U1203 diagnostic trouble code?

To fix U1203: Check the integrity of the wiring harness in the doors. Inspect the connection connectors for oxidation. Scan the system for other errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1203?

Yes, but get it checked soon

How much does it cost to fix U1203?

The estimated repair cost for U1203 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat