Fault code P1113 – a step-by-step guide to diagnosing and fixing it

The meaning of error code P1113 – IAT Sensor Open/Short

P1113: Causes, signs and repairs

Error code P1113 is displayed and the check engine light is on - what does this mean?

The DTC P1113 is recognized by the OBD system when a problem is detected with the intake air temperature sensor (IAT), specifically too high a voltage in the circuit. This manufacturer-specific fault code mainly affects the engine management system and can occur in different makes of vehicle, although the exact definition may vary depending on the manufacturer.

What causes can this fault code have?

Defective intake air temperature sensor (IAT)
Broken or damaged cable to the IAT sensor
Corroded or loose plug connections
Short circuit in the wiring of the sensor system
Defective engine control unit (ECU)
Faulty ground connection of the sensor
Dirty or contaminated sensor

Which symptoms occur in parallel with error code P1113?

Loss of engine power: Reduced acceleration and uneven engine running
Increased fuel consumption: The vehicle consumes more fuel than usual
Starting problems: Difficulties with cold starts or prolonged starting process
Irregular idling: Engine runs unevenly or stutters at idle speed
Black smoke: Dark exhaust fumes due to incorrect fuel/air mixture
Jerking when accelerating: Uneven power delivery under load

How can the problem with fault code P1113 be rectified?

Repairing fault code P1113 requires a systematic approach to identify the root cause.
Replacing the IAT sensor: Replace the defective intake air temperature sensor with a new original part and then delete the fault memory
Repair the wiring: Check all cables to the sensor for damage, repair or replace defective cables and ensure proper insulation
Cleaning the plug connections: Clean all connectors with contact spray, remove corrosion and ensure tight fit of connections
Checking the earth connection: Check the sensor's earth cable, clean earth points and establish a reliable connection
Diagnosis of the engine control unit: Have the ECU tested by a specialist workshop and repaired or replaced if necessary
Complete system diagnostics: Carry out comprehensive OBD diagnostics to identify and rectify other hidden faults

FAQ - Frequently asked questions about DTC P1113

Can I continue driving with error code P1113?

Short journeys are possible, but you should have the problem rectified as soon as possible. The trouble code can lead to increased fuel consumption and engine damage if it is ignored.

How much does it cost to repair error code P1113?

The costs vary depending on the cause: a new IAT sensor costs 30-80 euros, wiring repairs 50-150 euros, and ECU problems can cost 300-800 euros.

How can I diagnose fault code P1113 myself?

Use an OBD diagnostic device, check the sensor values in live mode and visually inspect the wiring and plug connections for obvious damage.

Is the error code P1113 manufacturer-specific?

Yes, P1113 is a manufacturer-specific code that mainly occurs in certain makes of car. The exact definition may vary between manufacturers.

How long does it take to repair the P1113 code?

A simple sensor replacement takes 30-60 minutes, while more complex wiring repairs can take 2-4 hours.

Can fault code P1113 be caused by bad fuel?

No, this EOBD code is specific to the intake air temperature sensor and is not affected by fuel quality, but by electrical or mechanical faults in the sensor itself.

Vehicles in which fault code P1113 occurs most frequently

Fault code P1113 is a manufacturer-specific DTC that indicates problems with the intake air temperature sensor and mainly relates to electrical faults in the sensor system, but is most common in the following vehicles:

Ford: Focus, Fiesta, Mondeo, Ka (2000-2015)
Mazda: 3, 6, CX-5, MX-5 (2003-2018)
Volvo: S40, V50, C30, S60 (2004-2016)
Honda: Civic, Accord, CR-V, Jazz (2001-2014)
Hyundai: i30, Elantra, Tucson, i20 (2007-2019)
Kia: Ceed, Sportage, Rio, Picanto (2006-2017)

If code P1113 occurs in your vehicle, you should first carry out a thorough visual inspection of the intake air temperature sensor and its wiring. For more complex electrical problems or if you are unsure, it is recommended that you visit a qualified workshop, as improper repairs to the engine management system can lead to costly consequential damage. Correcting this error code at an early stage not only prevents further damage, but also optimizes fuel consumption and engine performance.

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