What Does P1914 Mean?
The transmission fluid temperature sensor circuit has an abnormal voltage reading, indicating an open circuit, short to power, or short to ground. This is functionally identical to P1909 and prevents accurate temperature monitoring.
Common Causes
35%
Damaged or corroded transmission temperature sensor connector or wiring
30%
Failed transmission fluid temperature sensor
20%
Pinched or chafed wiring causing intermittent short
10%
Moisture or corrosion in TCM connector terminals
5%
TCM internal circuit failure
Diagnostic Steps
1
Step 1: Inspect transmission temperature sensor connector for damage, corrosion, or loose pins
2
Step 2: Test transmission temperature sensor resistance at different temperatures; compare to specifications
3
Step 3: Check wiring harness continuity from sensor to TCM; test for shorts to power and ground
4
Step 4: Examine wiring routing for damage from heat, abrasion, or contact with moving parts
5
Step 5: Verify TCM reference voltage and ground circuits; substitute known-good sensor if wiring tests normal
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The transmission fluid temperature sensor circuit has an abnormal voltage reading, indicating an open circuit, short to power, or short to ground. This is functionally identical to P1909 and prevents accurate temperature monitoring.
The most common cause of P1914 (Trans Temp Sensor Circuit Open or Shorted to Pwr or Gnd) is: Damaged or corroded transmission temperature sensor connector or wiring
Typical repair costs for P1914 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Transmission may operate in default mode with altered shift patterns. Without temperature monitoring, transmission could overheat undetected, leading to internal damage or failure.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1914 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Manufacturer
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