Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer thinks the temperature of the air going into the engine is not changing the way it expects, which might mean the sensor is not working right.
The code indicates that the intake air temperature sensor is reporting a gradient (change over time) that is not plausible, suggesting a potential sensor fault or wiring issue.
The intake air temperature sensor measures the temperature of the air entering the engine. This data is used by the engine control module (ECM) to adjust fuel delivery and ignition timing. If the sensor's readings change in a way that doesn't make sense, the ECM triggers this code.
• Check Engine Light is on
• Poor fuel economy
• Erratic engine performance
• Faulty intake air temperature sensor
• Damaged or corroded wiring or connectors
• ECM software issue
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, second generation
• Use an OBD-II scanner to confirm the code.
• Inspect the intake air temperature sensor and its wiring.
• Test the sensor's resistance and compare it to specifications.
• Replace the intake air temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Update ECM software if applicable.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• BMW 3 Series
• Audi A4
• Volkswagen Golf
• Regularly inspect and clean sensor connections.
• Ensure air intake system is free from debris.
• Perform routine maintenance checks.
Sensor Issue
• Do not ignore the Check Engine Light.
• Consult a professional mechanic for diagnosis.
• Avoid harsh driving conditions until fixed.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has been more prevalent in vehicles with aging sensors or those exposed to extreme temperatures.
Moderate – While the vehicle may still be drivable, it is important to address this issue to avoid potential engine performance problems.
Driving with a malfunctioning sensor can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Stable ambient temperature
The intake air temperature sensor is typically located in the air intake duct or manifold.
Q: Can I drive with a P115E code?
A: While you can drive with this code, it's best to get it checked soon to avoid potential engine issues.
Q: How do I know if my intake air temperature sensor is bad?
A: Symptoms include poor fuel economy, erratic engine performance, and a Check Engine Light.
High-End · Full-system diagnostics
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Network faults often require full-system access instead of a generic code reader alone.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
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
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
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.