The P0974: Shift Solenoid ‘A’ Control Circuit High refers to an issue where the shift solenoid ‘A’ control circuit is receiving higher than expected voltage. This can cause the solenoid to malfunction, leading to improper transmission shifting and poor performance.
P0974 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0974: Shift Solenoid ‘A’ Control Circuit High |
| Is it serious? | Yes, high voltage can cause improper transmission operation and shifting problems. |
| Possible causes | – High voltage in the shift solenoid ‘A’ control circuit – Faulty shift solenoid ‘A’ – Wiring or connector issues |
| How to diagnose? | – Check the circuit for high voltage – Inspect wiring and connectors – Replace the shift solenoid ‘A’ if necessary |
P0974 Meaning
The P0974: Shift Solenoid ‘A’ Control Circuit High code indicates that the voltage in the shift solenoid ‘A’ control circuit is higher than the required level. Excessive voltage can cause the solenoid to malfunction, resulting in transmission shifting issues and affecting vehicle performance.
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 might provide further insight into the high voltage issue. | OBD-II Scanner |
| Test for High Voltage | Use a multimeter to check for high voltage in the shift solenoid ‘A’ control circuit. Compare the voltage readings with manufacturer’s specifications. | Multimeter |
| Inspect Wiring and Connectors | Inspect the wiring and connectors for damage, corrosion, or loose connections that could be causing the high voltage. | Flashlight, Multimeter |
| Test the Solenoid | Test the shift solenoid ‘A’ for proper operation. Replace the solenoid if it is malfunctioning or receiving excessive 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 ensure the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the system to ensure the P0974 code does not return after the test drive. | OBD-II Scanner |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko