Applicable Systems
OBD-II
Symptoms
Shift solenoid A fault; transmission may not shift correctly; may be stuck in one gear (limp mode).
Possible Causes
- Shift solenoid A internal failure
- Solenoid wiring fault
- TCM driver circuit fault
Troubleshooting Steps
- Step 1: Check shift solenoid A resistance
Resistance within spec (20-40 ohm) - Step 2: Inspect solenoid wiring
Wiring intact - Step 3: Command solenoid A with scanner
Solenoid clicks when activated - Step 4: Replace solenoid if no response
Solenoid A responds - Step 5: Clear code and verify shifting
Transmission shifts through all gears
How to Reset
Clear with OBD-II scanner after solenoid replacement.
Common Replacement Parts
- Shift Solenoid A (OEM spec)
Frequently Asked Questions
- Q: Which shifts does solenoid A control?
Depends on transmission model. Typically controls 1-2 shift. Check service manual for your specific transmission's solenoid application chart.
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Source: SAE J2012 standard DTC list + OBD-II portal
Category: OBD-II
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