B1260 — Solar Radiation Sensor Circuit Short To Battery

What are the symptoms of B1260?

Drivers most often notice: the affected function (locks, windows, lighting, wipers) works intermittently or not at all, warning light on the dashboard, no impact on engine operation in most cases.

What is the most common cause of B1260?

The most common causes are: damaged wiring in door jambs or wet areas, blown fuse or failed relay, body control module (BCM) fault.

Is it safe to drive with B1260?

Usually safe to drive — body codes rarely affect drivability. Exceptions: exterior lighting and wipers in bad weather, and central locking faults that can leave the car unsecured.

How much does it cost to fix B1260?

BCM repair or replacement — $300–$900; Replace the switch or actuator — $120–$450; Repair wiring or connectors — $80–$250. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

Will B1260 clear itself?

Sometimes B1260 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

When the powertrain control module detects a solar radiation sensor circuit that is feeding voltage directly to the battery instead of operating within its normal range, it logs OBD2 code B1260. This fault falls squarely in the body electrical system rather than the engine management system, which means the problem involves one of the comfort or convenience circuits the body control module oversees. The module does not set B1260 on a single glitch; it confirms the fault over multiple drive cycles before permanently storing the code and illuminating the check engine light.

The solar radiation sensor itself plays a role in regulating automatic climate control and dashboard lighting intensity based on how much sunlight is entering the cabin. When the circuit shorts to battery, the sensor output becomes meaningless to the module, so functions that depend on accurate ambient light data behave erratically or stop working entirely. B1260 captures freeze frame data at the moment the fault meets the threshold, recording engine speed, load, temperature, and vehicle speed — information that becomes the starting point for any effective diagnosis.

Body control modules today monitor dozens of inputs continuously while the vehicle runs. When the solar radiation sensor circuit deviates from its expected voltage band for longer than acceptable, the BCM treats this as a confirmed fault and stores B1260. In most cases the module will also disable the affected function until the fault clears, which is why drivers notice something has stopped working even though the engine itself runs normally.

Symptoms of B1260

• The solar radiation sensor–dependent system operates intermittently or fails completely
• Dashboard warning light remains illuminated after the fault is detected
• Automatic climate control may behave unpredictably if it relies on ambient light input
• Interior or exterior lighting that depends on the sensor may stay on or off at the wrong times
• No drivability issues — the engine, transmission, and braking systems operate as designed
• The fault may come and go with temperature changes if the short is partial

Common causes

• Body control module internal failure or software corruption
• Damaged wiring or connectors in the solar radiation sensor circuit
• Corrosion at the sensor connector due to water intrusion or age
• Blown fuse protecting the sensor circuit or a failed relay
• Faulty solar radiation sensor itself
• Short to battery somewhere in the related wiring harness

How to diagnose B1260

1. Connect an OBD2 scanner, confirm B1260 is stored, and record the freeze frame data. Note the engine conditions recorded at the moment the fault appeared — those values guide the rest of the diagnosis.
2. Pull any related codes. Secondary faults in the B0xxx range often point to the root cause rather than the result.
3. Check manufacturer technical service bulletins for your specific make, model, and year. Many body electrical faults have documented factory fixes or module updates that a technician can apply without part replacement.
4. Visually inspect the solar radiation sensor, its connector, and the surrounding harness. Look for cracked insulation, corroded pins, and any signs of water damage.
5. Test the circuit for unwanted resistance or shorts using a multimeter. At flex points — door jambs and hatch hinges especially — wires fatigue first.
6. Clear B1260, complete a drive cycle that reproduces the conditions from the freeze frame, and verify the code does not return before returning the vehicle to service.

Repair options

• Body control module diagnosis, repair, or replacement: $300–$900
• Solar radiation sensor or related actuator replacement: $120–$450
• Wiring harness repair or connector replacement: $80–$250

How much does it cost to fix B1260?

The total bill hinges entirely on what part is actually faulty. Independent shop labor runs roughly $80–$120 per hour in most markets, and most repairs under this code take one to three hours of诊断 time plus parts. If the fix involves repairing wiring rather than replacing the BCM, expect to pay toward the lower end of the range. BCM replacement sits at the opposite extreme, particularly when the module requires programming or calibration. Most shops quote a diagnostic fee of $100–$150 before any work begins, which counts toward the final repair if you proceed. All-in costs for B1260 typically fall between $80 and $900, with the majority of cases resolved for under $300 once the faulty component is identified.

Can you drive with B1260?

Generally yes. B1260 belongs to the body electrical system, and body codes do not normally affect engine performance, transmission operation, or safety-critical systems. The solar radiation sensor is a comfort feature, not a safety system. That said, if the fault also affects exterior lighting or automatic wipers, operate the vehicle with additional caution in low visibility or inclement weather. Central locking anomalies tied to the same module could theoretically leave the car unsecured. Under normal conditions, however, the vehicle remains fully driveable until a repair can be scheduled.

Related OBD2 codes

• B1200: Climate Control Pushbutton Circuit Failure
• B1201: Fuel Sender Circuit Failure
• B1202: Fuel Sender Circuit Open
• B1203: Fuel Sender Circuit Short To Battery
• B1204: Fuel Sender Circuit Short To Ground
• B1205: EIC Switch-1 Assembly Circuit Failure