What Does B1260 Mean?
This code indicates that the Body Control Module (BCM) or Climate Control Module has detected a short to battery voltage in the solar radiation sensor circuit. The solar radiation sensor monitors sunlight intensity to help the automatic climate control system adjust cabin temperature and air distribution. The module detected voltage on the signal circuit that is higher than expected, indicating the wire is contacting a power source.
Common Causes
45%
Damaged or chafed wiring harness causing short to power in the solar sensor circuit
30%
Failed solar radiation sensor with internal short to voltage
15%
Corroded or damaged connector terminals at sensor or module creating cross-circuit short
10%
Body Control Module or Climate Control Module internal failure causing false detection
Diagnostic Steps
1
Step 1: Visually inspect the solar radiation sensor (typically located on dashboard top near windshield) and its connector for obvious damage, corrosion, or terminal spread. Check for water intrusion or physical damage to sensor housing.
2
Step 2: Disconnect the solar radiation sensor connector and use a digital multimeter to measure voltage on the signal wire at the vehicle harness side with ignition on. Reading should be 0-0.5V (pull-down or reference voltage). If battery voltage (12V+) is present, the wire has a short to power in the harness.
3
Step 3: With sensor disconnected, measure resistance between the signal wire and battery positive at the harness connector. Reading should be infinite (OL). Any measurable resistance indicates a short to power. Wiggle and flex the harness while monitoring to locate intermittent shorts.
4
Step 4: If harness tests good, reconnect sensor and backprobe the signal wire at the sensor connector with ignition on. Compare voltage reading to specification (typically 0.5-4.5V varying with light intensity). Consistent battery voltage indicates failed sensor with internal short.
5
Step 5: Inspect harness routing from sensor to BCM/Climate module for areas where wires may contact power sources, sharp edges, or pinch points. Pay special attention to A-pillar routing and dashboard mounting points.
6
Step 6: After repairing wiring or replacing sensor, clear codes and verify sensor operation by blocking/exposing sensor to light while monitoring live data. Signal voltage should vary smoothly. Test drive and verify climate control responds appropriately to sunlight changes.
Estimated Repair Cost
$100 - $450
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) or Climate Control Module has detected a short to battery voltage in the solar radiation sensor circuit. The solar radiation sensor monitors sunlight intensity to help the automatic climate control system adjust cabin temperature and air distrib...
The most common cause of B1260 (Solar Radiation Sensor Circuit Short To Battery) is: Damaged or chafed wiring harness causing short to power in the solar sensor circuit
Typical repair costs for B1260 range from $100 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code does not affect vehicle safety or drivability. The automatic climate control system may not function optimally, potentially defaulting to manual mode or failing to adjust for direct sunlight. Repair can be scheduled at convenience.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1260 to identify the root cause.
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Quick Info
Category
Body
System
Climate Control System
Difficulty
Type
Manufacturer
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