Damaged, chafed or corroded wiring to the sensor (open circuit, short to earth or short to supply); Loose, corroded or contaminated connector at the sensor; Faulty intake air temperature sensor 3; Poor reference voltage or earth supply to the sensor circuit; Sensor contaminated with oil or moisture, or damaged by heat; Fault inside the engine control unit.

P00E8

Intake Air Temperature Sensor 3 Circuit Bank 1.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
0: AreaFuel and air metering, auxiliary emission controls
E8: FaultThe specific fault in that area

What it means

P00E8 is a generic code meaning a fault in the Intake Air Temperature Sensor 3 circuit on Bank 1. The control unit has seen a signal from this sensor that is outside the expected range, implausible, or electrically faulty. Which physical sensor is 'sensor 3' and where it sits (for example in the intake tract, charge air path or after the intercooler) depends on the model and engine, so check the manufacturer's data.

Symptoms

Engine warning light on
Poor or hesitant acceleration
Rough idle or uneven running
Hard starting, especially when cold
Reduced power or limp mode on some vehicles
Higher than normal fuel consumption

Possible causes

Damaged, chafed or corroded wiring to the sensor (open circuit, short to earth or short to supply)likely
Loose, corroded or contaminated connector at the sensorlikely
Faulty intake air temperature sensor 3likely
Poor reference voltage or earth supply to the sensor circuitpossible
Sensor contaminated with oil or moisture, or damaged by heatpossible
Fault inside the engine control unitrare

How to diagnose

Read the stored codes and freeze frame data to see engine temperature, load and conditions when the fault set, and note any other temperature or air-flow codes.
Find out from the manufacturer's data which sensor is number 3 on this engine and where it is fitted.
Inspect the sensor, its connector and the wiring for damage, chafing, heat damage, oil contamination, bent pins or corrosion.
With the engine cold, compare the live reading from this sensor with the other intake air and coolant temperatures; they should be similar.
Unplug the sensor and check the live value moves to the expected open-circuit reading, then bridge the terminals and check it moves the other way, to prove the wiring and control unit response.
Check the sensor's resistance against the specification at a known temperature, and test again as it warms up.
Test the reference voltage and earth at the connector, and check wiring continuity and insulation back to the control unit.
After repair, clear the code and road test while watching the live value for sensible, smooth changes.

How to fix

Repair or replace damaged wiring and fix any short or open circuit.
Clean, repair or replace a corroded or loose connector and terminals.
Replace the intake air temperature sensor 3 if it is out of specification or reading implausibly.
Restore a faulty reference voltage or earth supply found during testing.
Fix the source of oil or moisture contamination, then replace the affected sensor.
Only if wiring, connector and sensor all test good, investigate the control unit following the manufacturer's procedure.

Can I keep driving?

Medium severity

The car can usually be driven for a short time, but the control unit may use a default temperature value, which can affect running and economy. Get it checked soon, and stop if power is badly reduced or the engine runs very poorly.

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