What Does P1287 Mean?
An electrical fault has been detected in the control circuit for the air-assisted injection valve switching solenoid on bank 2. This indicates a general electrical problem without specifying high or low voltage.
Common Causes
35%
Damaged wiring or chafed harness in solenoid circuit
30%
Failed air injection switching solenoid
20%
Intermittent connection at solenoid connector
15%
PCM driver circuit malfunction
Diagnostic Steps
1
Step 1: Inspect wiring harness for visible damage, chafing, or heat exposure
2
Step 2: Wiggle test wiring and connectors while monitoring live data for intermittent fault
3
Step 3: Measure solenoid resistance and compare to specifications
4
Step 4: Check for proper voltage supply and ground at solenoid during activation
5
Step 5: Swap solenoid with bank 1 if possible to determine if fault follows component
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
An electrical fault has been detected in the control circuit for the air-assisted injection valve switching solenoid on bank 2. This indicates a general electrical problem without specifying high or low voltage.
The most common cause of P1287 (Switching Solenoid for Air Assisted Injection Valves Bank 2 Control Circuit Electrical) is: Damaged wiring or chafed harness in solenoid circuit
Typical repair costs for P1287 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Generally safe to drive but may experience reduced engine performance, rough idle, or increased emissions. Schedule repair soon.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1287 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection / Air-Assist System
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
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