A P1113 trouble code is related to an open circuit with a vehicle’s intake air temperature sensor that measures the air entering the engine to adjust the fuel and cooling system in order to maintain a normal operating temperature threshold.
What the P1113 code means
P1113 is a OBD-II manufacturer-specific code for an open circuit issue with the intake air temperature (IAT) sensor. The sensor contains a semiconductor device that changes resistance based on air temperatures coming into the intake manifold. The computer monitors voltage and resistance from the sensor and if the signal is erratic, the vehicle will assume there is an open or shorted circuit and trigger a P1113.
What causes the P1113 code?
The most common causes for a P1113 are:
- Faulty intake air temperature sensor wiring/electrical connectors
- Faulty intake air temperature sensor
- Faulty engine computer
What are the symptoms of the P1113 code?
Some P1113 codes won’t result in anything more than a check engine light but if the intake air temperature sensor is indeed back, it can cause issues ranging from a lack of power, trouble with cold starts, and decreased fuel economy.
How does a mechanic diagnose the P1113 code?
Because a P1113 code is for an open/short circuit, your mechanic will first visually inspect the sensor and associated wiring, looking for any obvious damages. A good cleaning can often remedy a P1113. However, if the sensor is suspected to be bad, they will then connect a professional-grade OBD-II scanner to the vehicle and monitor the reading from the IAT. At cold start, it should roughly match the coolant reading. Your mechanic will need to test drive the vehicle to get it up to operating temperature and ensure the IAT reading is correct when intake temperatures are high.
Common mistakes when diagnosing the P1113 code
Because all P1XXX codes are manufacturer specific, it’s critical to have any code read by a professional-grade OBD-II scanner to ensure you’re fixing the correct problem. For example, a P1113 code in a general motors vehicle is for the intake resonance switchover solenoid control circuit.
How serious is the P1113 code?
Faulty intake air temperature readings can cause a variety of unsavory driving characteristics, making it fairly serious for you to correct a P1113 as quickly as possible.
What repairs can fix the P1113 code?
The most common repairs for a P1113 are as follows:
- Repairing and cleaning intake air temperature sensor wiring
- Replacing the intake air temperature sensor
- Replacing the engine computer
Additional comments for consideration regarding the P1113 code
All P1113 codes that deal with a open/short intake air temperature sensor are associated with either Citroen/Peugeot or Ford vehicle.
Need help with a P1113 code?
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