Faulty intake air temperature (IAT) sensor or its wiring.; Faulty fuel temperature sensor or its wiring.; Corroded or damaged connector pins at either sensor.; Open or short circuit in the sensor signal or ground circuits.; PCM software calibration issue requiring a reflash.; Extreme ambient temperature conditions exceeding sensor accuracy range (rare).

DTC codes / P00xx · Fuel and air metering and auxiliary emission controls / P00E5

P00E5Intake Air Temperature/Fuel Temperature Correlation

Q: What does code P00E5 mean?

Intake Air Temperature/Fuel Temperature Correlation. P00E5 indicates that the powertrain control module (PCM) has detected a mismatch between the intake air temperature (IAT) sensor and the fuel temperature sensor readings when the engine is cold and has been off for an extended period. The PCM expects these two temperatures to be nearly identical after a long soak, and a deviation beyond a calibrated threshold triggers this code.

P00E5 indicates that the powertrain control module (PCM) has detected a mismatch between the intake air temperature (IAT) sensor and the fuel temperature sensor readings when the engine is cold and has been off for an extended period. The PCM expects these two temperatures to be nearly identical after a long soak, and a deviation beyond a calibrated threshold triggers this code.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaFuel and air metering and auxiliary emission controls

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms.
Rough idle or hesitation during cold starts, especially in low ambient temperatures.
Reduced fuel economy as the PCM may default to a richer fuel mixture.
Intermittent stalling shortly after startup in extreme cold conditions.
A slight decrease in engine performance or throttle response.
In some cases, no drivability issues at all besides the warning light.

Common causes, most likely first

Faulty intake air temperature (IAT) sensor or its wiring.
Faulty fuel temperature sensor or its wiring.
Corroded or damaged connector pins at either sensor.
Open or short circuit in the sensor signal or ground circuits.
PCM software calibration issue requiring a reflash.
Extreme ambient temperature conditions exceeding sensor accuracy range (rare).

How to diagnose and fix it

Use a scan tool to record freeze-frame data and verify the code is current, then clear it and perform a cold soak test to see if it returns.
Visually inspect the IAT and fuel temperature sensor connectors and wiring for damage, corrosion, or loose pins.
Measure the resistance of both sensors with a multimeter and compare to the manufacturer's temperature-resistance chart; replace any sensor that is out of specification.
Check for continuity and short circuits in the signal and ground wires between each sensor and the PCM.
If wiring and sensors test good, check for technical service bulletins (TSBs) regarding PCM calibration and reflash if applicable.
After repairs, clear codes and perform a cold soak overnight to confirm the correlation code does not reset.

Cold Soak Test Is Critical for P00E5

This code often sets after a battery replacement or PCM reset because the adaptive learning for temperature correlation is lost, and it may not return after a proper drive cycle.
A common misdiagnosis is replacing the IAT sensor when the actual fault is a biased fuel temperature sensor or a wiring issue shared with the fuel composition sensor on flex-fuel vehicles.
The PCM may use the fuel temperature sensor to infer fuel composition on flex-fuel vehicles, so a fuel temperature fault can also cause drivability issues beyond the correlation code.
In some vehicles, the fuel temperature sensor is integrated into the fuel tank pressure sensor or fuel pump module, making it more expensive to replace than the IAT sensor.
Extreme cold ambient temperatures below -20°F (-29°C) can cause temporary correlation errors that do not indicate a true fault, so verify the code under normal conditions.

Can I keep driving with P00E5?

The vehicle is generally safe to drive with this code because it rarely causes immediate safety issues, but avoid extended driving with the check engine light on until diagnosed. If you experience rough running or stalling, have the vehicle inspected promptly to prevent potential fuel system damage.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.