P0745: Pressure Control Solenoid A Malfunction
The P0745 code indicates a malfunction in the transmission pressure control solenoid 'A', which regulates hydraulic pressure within the automatic transmission. This solenoid is part of the valve body and receives commands from the powertrain control module (PCM) to adjust line pressure for proper shift feel and timing. A failure can cause erratic shifting, slipping, or harsh engagement, and may be due to electrical issues, mechanical blockage, or contaminated transmission fluid.
01. Most Common Causes
- Faulty pressure control solenoid A
- Wiring or connector issues in the solenoid circuit
- Low or contaminated transmission fluid
- Internal transmission mechanical failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Erratic or harsh shifting
- Transmission slipping or delayed engagement
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P0745 is present; check for related codes.
Step 2: Inspect transmission fluid level and condition; top off or replace if necessary.
Step 3: Test solenoid A resistance and power/ground circuits using a multimeter.
Step 4: If electrical tests pass, remove valve body and test solenoid operation; replace if stuck or faulty.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the transmission may slip or shift erratically, potentially causing further damage. Limp mode may activate, limiting speed.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400 for solenoid replacement, including parts and labor. If internal damage is found, costs can exceed $1,000.