P2820 - Pressure Control Solenoid 'G' Performance/Stuck Off
The P2820 code indicates that the Transmission Control Module (TCM) has detected a malfunction in the pressure control solenoid 'G', which is responsible for regulating hydraulic pressure within the automatic transmission. The solenoid is commanded to a specific duty cycle, but the TCM detects that the actual pressure response is not within the expected range, or the solenoid is stuck in the off position. This can lead to improper shift timing, harsh shifts, or transmission slippage.
01. Most Common Causes
- Faulty pressure control solenoid 'G'
- 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
- Harsh or delayed shifts
- Transmission slipping
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan the TCM for codes and record freeze frame data.
Step 2: Inspect transmission fluid level and condition; top off or replace if necessary.
Step 3: Visually inspect wiring and connectors for damage, corrosion, or loose connections.
Step 4: Test solenoid resistance and operation using a multimeter and scan tool.
Step 5: If solenoid is faulty, replace it; if wiring is damaged, repair as needed.
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.
How much does it cost to fix?▼
Repair costs typically range from $200 to $600, depending on labor rates and whether the solenoid or wiring needs replacement.