The P099F: Shift Solenoid ‘H’ Control Circuit High refers to a high voltage issue in the control circuit of shift solenoid ‘H’. This can be caused by excessive voltage in the control circuit, a faulty solenoid, or issues with the wiring and connectors. It may lead to transmission problems, such as erratic shifting.
P099F – Quick Overview
| Code | Information |
|---|---|
| Meaning | P099F: Shift Solenoid ‘H’ Control Circuit High |
| Is it serious? | Yes, this can cause transmission shifting issues and drivability problems. |
| Possible causes | – High voltage in the shift solenoid ‘H’ control circuit – Faulty shift solenoid ‘H’ – Wiring or connector issues |
| How to diagnose? | – Check the circuit for high voltage – Inspect wiring and connectors – Replace the shift solenoid ‘H’ if necessary |
P099F Meaning
The P099F code means that the shift solenoid ‘H’ is receiving a higher voltage than expected. This can cause the solenoid to malfunction, leading to transmission shifting problems, including harsh or delayed shifting. The root cause might be a fault in the wiring, connectors, or the solenoid itself.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to identify any additional transmission or solenoid-related codes. | OBD-II Scanner |
| Inspect Shift Solenoid ‘H’ | Visually inspect shift solenoid ‘H’ for signs of damage or malfunction. | Flashlight, Safety Gloves |
| Test the Circuit for High Voltage | Use a multimeter to measure voltage in the control circuit of shift solenoid ‘H’. | Multimeter |
| Inspect Wiring and Connectors | Check the wiring and connectors for any corrosion, shorts, or breaks. | Flashlight, Multimeter |
| Replace Shift Solenoid ‘H’ | If necessary, replace the shift solenoid ‘H’ if it is found to be faulty. | Replacement Parts (Solenoid) |
| Clear the Code and Test Drive | After completing repairs, clear the code using an OBD-II scanner and test drive the vehicle to verify the fix. | OBD-II Scanner, Vehicle Manual |
| Recheck for Codes | Re-scan the system to ensure that the P099F code has been resolved. | OBD-II Scanner |
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