U1242
Invalid Or Missing Data For Exterior Environment
U1242 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Exterior Environment. Common causes: outside temperature sensor malfunction, problems with the light sensor. Estimated repair cost: $17–89.
Symptoms
- Incorrect operation of automatic lighting
- Errors in climate control operation
- Malfunction indicator light comes on
- Incorrect outdoor temperature readings
- Failures in the operation of systems dependent on external conditions
Causes
- Outside temperature sensor malfunction
- Problems with the light sensor
- Open or short circuit in the sensor circuit
- Problems with the CAN bus
- Software error in the module
How to Fix
- Check the serviceability of the outside temperature sensor
- Diagnose light sensor
- Check the integrity of the wiring harness to the sensors
- Read error codes in other modules
- Update module software if necessary
Related codes
FAQ
What does the U1242 code mean?
U1242 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Exterior Environment
What causes a U1242 error code?
The most common causes of U1242 include: Outside temperature sensor malfunction; Problems with the light sensor; Open or short circuit in the sensor circuit; Problems with the CAN bus.
How do I fix a U1242 diagnostic trouble code?
To fix U1242: Check the serviceability of the outside temperature sensor. Diagnose light sensor. Check the integrity of the wiring harness to the sensors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1242?
Yes, but get it checked soon
How much does it cost to fix U1242?
The estimated repair cost for U1242 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat