P1845 GMC Code - 2-3 Shift Solenoid Circuit Low Input Voltage
Quick Answer
The P1845 GMC diagnostic trouble code (DTC) refers to a problem with the 2-3 Shift Solenoid Circuit, indicating that there is a low input voltage detected. Common causes include Faulty 2-3 Shift Solenoid, Damaged wiring or connectors in the solenoid circuit, Malfunctioning transmission control module (TCM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1845 GMC indicates 2-3 Shift Solenoid Circuit Low Input Voltage.
- Common causes
- Common causes include Faulty 2-3 Shift Solenoid, Damaged wiring or connectors in the solenoid circuit, Malfunctioning transmission control module (TCM).
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1845 GMC Description
The P1845 GMC diagnostic trouble code (DTC) refers to a problem with the 2-3 Shift Solenoid Circuit, indicating that there is a low input voltage detected. In an automatic transmission system, solenoids are responsible for controlling the flow of transmission fluid and engaging specific gears for smooth shifting. The 2-3 Shift Solenoid specifically facilitates the transition from second to third gear.
Common Causes of P1845 GMC
- Faulty 2-3 Shift Solenoid
- Damaged wiring or connectors in the solenoid circuit
- Malfunctioning transmission control module (TCM)
- Low transmission fluid levels
- Internal transmission damage or wear
Symptoms of P1845 GMC
- Harsh or delayed shifting between gears
- Erratic shifting behavior while driving
- Transmission slipping or difficulty engaging gears
- Loss of power or acceleration
- Stuck in a specific gear
How to Fix P1845 GMC
- Begin by diagnosing the specific cause of the low input voltage in the 2-3 Shift Solenoid Circuit using a diagnostic scanner.
- Inspect the wiring and connectors associated with the solenoid circuit for any damage or corrosion. Repair or replace as needed.
- Test the 2-3 Shift Solenoid for proper functioning. Replace if found to be faulty.
- Check the transmission fluid levels and condition. Top up or perform a fluid flush if necessary.
- Clear the fault code and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P1845 GMC
The typical repair costs for addressing a P1845 GMC code can vary depending on the specific cause of the issue and the extent of the repair needed. On average, you can expect to pay between $200 to $500 for parts and labor. However, it's important to note that labor rates at auto repair shops can fluctuate based on location, the vehicle's make and model, and the complexity of the repair. It's recommended to obtain quotes from local shops to get a more accurate estimate for your specific situation.
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