P0991
P0991: Transmission Advanced System - Pressure Control Solenoid 'A' Circuit Low
📖 What Does P0991 Mean?
Symptoms
- • Transmission slipping
- • hesitation
- • or hesitation during acceleration
- • unusual noises
- • or difficulty shifting gears.
Common Causes
- • Faulty Pressure Control Solenoid 'A'
- • clogged transmission filter
- • low transmission fluid level
- • or a faulty transmission pressure sensor.
Possible Solutions
1. Check transmission fluid level and top off as necessary. 2. Inspect and clean the transmission filter. 3. Replace the Pressure Control Solenoid 'A' if faulty. 4. Check and replace the transmission pressure sensor if necessary.
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❓ Common Questions About P0991
Can I drive with code P0991?
You can drive for a short time, but should address code P0991 soon to avoid worsening the problem or failing an emissions test.
How much does it cost to fix P0991?
The estimated repair cost for code P0991 is between $100 and $500. This includes parts and labor for most makes and models.
Is this code easy to fix myself?
This repair is considered moderate. It may require specialized tools or significant disassembly. Professional help is recommended if you aren't an experienced DIYer.
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Other codes that may appear with P0991
P0989: Transmission Advanced System - Torque Converter Clutch Solenoid Circuit Malfunction
P0990: Transmission Advanced System - Pressure Control Solenoid 'A' Circuit Low
P0992: Transmission Advanced System - Pressure Control Solenoid 'A' Performance
P0993: Transmission Advanced System - Pressure Control Solenoid 'A' Performance
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system