What Does P1288 Mean?
The PCM has detected an abnormally low voltage signal from the air-assisted injection valve solenoid control circuit on bank 2. This mirrors P1284 but affects the opposite cylinder bank.
Common Causes
35%
Wiring short to ground in solenoid control circuit
30%
Failed air injection switching solenoid
20%
Corroded or damaged connector pins
15%
PCM internal driver circuit failure
Diagnostic Steps
1
Step 1: Inspect solenoid connector and wiring for damage, corrosion, or moisture intrusion
2
Step 2: Disconnect solenoid and measure coil resistance
3
Step 3: Use multimeter to test for short to ground in control circuit wiring
4
Step 4: Test ground circuit quality with voltage drop test during activation
5
Step 5: Compare voltage patterns with bank 1 circuit if available to isolate PCM issue
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The PCM has detected an abnormally low voltage signal from the air-assisted injection valve solenoid control circuit on bank 2. This mirrors P1284 but affects the opposite cylinder bank.
The most common cause of P1288 (Switching Solenoid for Air Assisted Injection Valves Bank 2 Control Circuit Signal Low) is: Wiring short to ground in solenoid control circuit
Typical repair costs for P1288 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but may have reduced performance, rough running, or increased emissions. Address within a few days to prevent potential engine damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1288 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection / Air-Assist System
Difficulty
Type
Manufacturer
Recommended Tools
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