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 the sensor that checks how hot the coolant is coming out of the radiator is sending a signal that's too high. It's like when a thermometer says it's way hotter than it really is.
The Engine Control Module (ECM) detects a high voltage signal from the engine coolant temperature sensor located at the radiator outlet. This indicates a potential issue with the sensor or its circuit.
The P1112 code is triggered when the ECM receives a signal from the radiator outlet coolant temperature sensor that exceeds the expected voltage range. This could be due to a faulty sensor, wiring issues, or a problem with the ECM itself.
• Check Engine Light illuminated
• Engine overheating
• Poor fuel economy
• Faulty engine coolant temperature sensor
• Wiring issues such as short to voltage in the sensor circuit
• Faulty ECM
ECM: Engine Control Module, the computer that controls engine functions.
Coolant: A fluid that circulates through the engine to remove excess heat.
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the wiring and connectors for damage or corrosion.
• Test the engine coolant temperature sensor for proper operation.
• Replace the engine coolant temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Ford Focus
• Chevrolet Malibu
• Toyota Camry
• Regularly inspect and maintain the cooling system.
• Ensure proper coolant levels and mixture.
• Check for leaks and repair them promptly.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent engine damage.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for warranty coverage on sensors and ECM.
The P1112 code has been reported in various models, typically related to sensor failures or wiring issues.
Moderate – Addressing this issue promptly can prevent engine overheating and potential damage.
Driving with a faulty engine coolant temperature sensor can lead to overheating and severe engine damage.
• Engine at operating temperature
• Stable ambient temperature
The engine coolant temperature sensor is typically located at the radiator outlet or near the thermostat housing.
Q: Can I drive my car with a P1112 code?
A: It's not recommended to drive with this code active, as it can lead to engine overheating.
Q: How do I reset the P1112 code?
A: After repairing the issue, you can reset the code using an OBD-II scanner.
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Fitment Required · Vehicle-fitment part
Relevant when coolant-temperature and warm-up faults indicate a thermostat-related issue.
Coolant-temperature and warm-up faults often lead to thermostat testing and replacement.
Thermostats are vehicle-specific and should be matched by engine and housing style.
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.