Faulty or drifting intake air temperature sensor; Faulty or drifting fuel temperature sensor (location and type depend on the model and engine); Wiring damage, corrosion or poor connector contact in either sensor circuit; Heat soak or a local heat source skewing one sensor, such as a sensor mounted close to hot components; Poor sensor reference supply or earth shared by the sensors; Control unit fault or outdated calibration where the manufacturer has documented one.

P00E5

Intake Air Temperature/Fuel Temperature Correlation.

Generic
Powertrain
Generic code
Low severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
0: AreaFuel and air metering, auxiliary emission controls
E5: FaultThe specific fault in that area

What it means

P00E5 is the generic code for an intake air temperature and fuel temperature correlation fault. The control unit compares the intake air temperature sensor reading with the fuel temperature reading, typically after the engine has been off long enough for them to be similar. It set the code because the two values differ by more than expected, or one does not behave plausibly. The exact test conditions and which sensors are used depend on the vehicle and engine.

Symptoms

Engine warning light on
Hard or extended cranking when starting, especially cold
Rough idle or hesitation
Slightly reduced performance or economy
Other temperature sensor codes stored alongside it

Possible causes

Faulty or drifting intake air temperature sensorlikely
Faulty or drifting fuel temperature sensor (location and type depend on the model and engine)likely
Wiring damage, corrosion or poor connector contact in either sensor circuitlikely
Heat soak or a local heat source skewing one sensor, such as a sensor mounted close to hot componentspossible
Poor sensor reference supply or earth shared by the sensorspossible
Control unit fault or outdated calibration where the manufacturer has documented onerare

How to diagnose

Read all stored codes and freeze frame data, noting the engine temperature, intake air temperature and fuel temperature when the code set.
Check for related codes on coolant, intake air or fuel temperature circuits, and deal with those first.
With the engine fully cold after a long soak, compare live intake air, fuel and coolant temperatures; they should be close to each other and to ambient.
Inspect both sensors and their connectors for damage, moisture, corrosion, bent pins and loose fit.
Check the wiring for chafing, heat damage and high resistance between each sensor and the control unit.
Measure sensor resistance or signal voltage against the manufacturer's temperature table for each sensor.
Check the sensor reference voltage and earth at the connectors.
Check for a software update or technical bulletin for the specific model and engine before suspecting the control unit.

How to fix

Replace the intake air temperature sensor if it reads out of range or drifts.
Replace the fuel temperature sensor, or the part it is built into, following the model-specific procedure.
Repair or replace damaged wiring and clean or renew corroded connector terminals.
Correct the mounting or heat shielding if a sensor is being affected by a nearby heat source.
Update the control unit calibration only if a documented update addresses this fault, or repair the control unit if testing proves it faulty.

Can I keep driving?

Low severity

The car can usually be driven while you arrange a repair, as this is typically a plausibility fault. If starting becomes difficult or the engine runs poorly, have it checked sooner.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.