The P0973: Shift Solenoid ‘A’ Control Circuit Low refers to a situation where the voltage in the shift solenoid ‘A’ control circuit is lower than expected. This can result in improper shifting and affect the transmission’s performance.
P0973 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0973: Shift Solenoid ‘A’ Control Circuit Low |
| Is it serious? | Yes, low voltage can lead to improper shifting and transmission performance issues. |
| Possible causes | – Low voltage in the shift solenoid ‘A’ control circuit – Faulty shift solenoid ‘A’ – Wiring or connector issues |
| How to diagnose? | – Check the circuit for low voltage – Inspect wiring and connectors – Replace the shift solenoid ‘A’ if necessary |
P0973 Meaning
The P0973: Shift Solenoid ‘A’ Control Circuit Low code indicates that the voltage in the shift solenoid ‘A’ control circuit is below the required level. This can cause the solenoid to malfunction, leading to improper regulation of hydraulic fluid in the transmission, which can cause poor shifting or slipping.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional fault codes that may provide more context about the low voltage issue. | OBD-II Scanner |
| Test for Low Voltage | Use a multimeter to test the voltage in the shift solenoid ‘A’ control circuit. Compare the voltage readings to the manufacturer’s specifications to determine if the voltage is too low. | Multimeter |
| Inspect Wiring and Connectors | Inspect the wiring and connectors for damage, corrosion, or loose connections that could cause low voltage in the solenoid circuit. | Flashlight, Multimeter |
| Test the Solenoid | Test the shift solenoid ‘A’ for proper operation. Replace the solenoid if it is faulty or receiving low voltage. | Diagnostic Tool, Replacement Solenoid |
| Clear the Code and Test Drive | After making repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to confirm that the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the system to ensure the P0973 code does not reappear after the test drive. | OBD-II Scanner |
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