What Does P1164 Mean?
This code indicates the fuel temperature sensor is providing a signal that is out of its expected range, showing erratic performance, or returning an incorrect value that does not correlate with actual conditions. Unlike a simple open/short fault, this code suggests the sensor is providing a reading but it is not plausible given other engine parameters such as engine coolant temperature, ambient air temperature, or operating duration.
Common Causes
30%
Degraded fuel temperature sensor drifting out of calibration
25%
Intermittent connection at the fuel temperature sensor connector
20%
High-resistance fault in the sensor circuit wiring
15%
Fuel contamination (water in fuel) affecting sensor readings
10%
Sensor mounting issue causing poor thermal contact with the fuel
Diagnostic Steps
1
Compare fuel temperature, coolant temperature, and ambient temperature on a cold soak start; all three should be within a few degrees of each other.
2
Monitor fuel temperature in live data during a warm-up cycle; the reading should rise gradually and logically with engine operating time.
3
Wiggle-test the fuel temperature sensor connector while monitoring live data for erratic signal fluctuations indicating an intermittent connection.
4
Check the sensor signal wire for high resistance using a voltage drop test between the sensor connector and PCM connector.
5
If fuel contamination is suspected, collect a fuel sample and check for water or particulate; address fuel quality before replacing the sensor.
6
Replace the fuel temperature sensor if readings are consistently implausible with confirmed good wiring.
Estimated Repair Cost
$80 - $300
Parts + labor, varies by vehicle and location
This code indicates the fuel temperature sensor is providing a signal that is out of its expected range, showing erratic performance, or returning an incorrect value that does not correlate with actual conditions. Unlike a simple open/short fault, this code suggests the sensor is providing a reading...
The most common cause of P1164 (Fuel Temperature Sensor Range/Performance/Incorrect Signal) is: Degraded fuel temperature sensor drifting out of calibration
Typical repair costs for P1164 range from $80 to $300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Minimal safety risk. The PCM uses fuel temperature for fine-tuning injection quantity; an incorrect value may cause marginally incorrect fueling but is unlikely to create a dangerous condition.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1164 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Manufacturer
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