Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks something is wrong with the temperature of the fuel vapors during a cold start. It's like when you wake up in the morning and your thermometer says it's a very strange temperature outside.
The vehicle's engine control module (ECM) detects an implausible temperature reading from the EVAP system during a cold start.
The P1194 code is triggered when the ECM receives an implausible signal from the EVAP system's temperature sensor during a cold start. This can occur if the sensor is faulty or if there is an issue with the EVAP system itself, such as a leak or blockage.
• Check Engine Light is on
• Poor fuel economy
• Difficulty starting the engine in cold conditions
• Faulty EVAP temperature sensor
• Wiring issues in the EVAP system
• Leaking or blocked EVAP canister
EVAP: Evaporative Emission Control System
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the EVAP temperature sensor and wiring.
• Check for leaks or blockages in the EVAP system.
• Replace the EVAP temperature sensor if faulty.
• Repair or replace damaged wiring.
• Clear any blockages in the EVAP system.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford Focus
• Regular maintenance of the EVAP system
• Inspect and replace faulty sensors
• Check for leaks regularly
Sensor Issue
• Get the car checked by a professional if the Check Engine Light is on.
• Avoid driving with a full tank if you suspect EVAP issues.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
This code has been more common in vehicles with aging EVAP systems, particularly in colder climates.
Moderate – While the vehicle may still be drivable, it can lead to increased emissions and fuel consumption.
Driving with a malfunctioning EVAP system can lead to increased emissions, which may not comply with local environmental regulations.
• Vehicle must be cold started.
• Ambient temperature should be within normal range for accurate diagnosis.
The EVAP temperature sensor is typically located near the EVAP canister, which is often found in the engine bay or near the fuel tank.
Q: Can I drive with a P1194 code?
A: Yes, but it's best to get it checked soon to avoid potential fuel economy issues.
Q: Will a P1194 code affect my vehicle's performance?
A: It may lead to poor fuel economy and difficulty starting in cold conditions.
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.