Open circuit in the sensor signal wire, such as a broken wire or disconnected connector; Short to voltage on the signal circuit, often from chafed wiring contacting a power wire; Failed charge air cooler coolant temperature sensor; Corroded or damaged sensor connector terminals causing high resistance; Faulty powertrain control module, though this is uncommon; Poor ground connection for the sensor circuit, leading to a reference voltage shift

DTC codes / P00xx · Fuel and air metering and auxiliary emission controls / P00E1

P00E1Charge Air Cooler Coolant Temperature Sensor A Circuit High

Q: What does code P00E1 mean?

Charge Air Cooler Coolant Temperature Sensor A Circuit High. P00E1 indicates that the powertrain control module has detected an abnormally high voltage on the signal circuit of the charge air cooler coolant temperature sensor, which is used to monitor the temperature of the coolant in the air-to-liquid intercooler system. The high voltage reading typically means the sensor circuit is open, shorted to voltage, or the sensor itself has failed, preventing accurate temperature feedback for charge air cooling strategy.

P00E1 indicates that the powertrain control module has detected an abnormally high voltage on the signal circuit of the charge air cooler coolant temperature sensor, which is used to monitor the temperature of the coolant in the air-to-liquid intercooler system. The high voltage reading typically means the sensor circuit is open, shorted to voltage, or the sensor itself has failed, preventing accurate temperature feedback for charge air cooling strategy.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

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
Reduced engine performance or power derate due to protective strategies
Poor fuel economy or increased emissions as the PCM substitutes default values
In rare cases, overheating of the charge air cooler system if the fault masks a real temperature issue
Intermittent drivability issues if the circuit fault is temperature or vibration sensitive

Common causes, most likely first

Open circuit in the sensor signal wire, such as a broken wire or disconnected connector
Short to voltage on the signal circuit, often from chafed wiring contacting a power wire
Failed charge air cooler coolant temperature sensor
Corroded or damaged sensor connector terminals causing high resistance
Faulty powertrain control module, though this is uncommon
Poor ground connection for the sensor circuit, leading to a reference voltage shift

How to diagnose and fix it

Verify the code with a scan tool and check live data for the charge air cooler coolant temperature sensor to confirm an abnormally high voltage reading
Inspect the sensor connector and wiring harness for obvious damage, corrosion, or loose pins, and repair as needed
Measure the sensor resistance with a multimeter and compare to specifications; replace the sensor if out of range
Check for continuity and voltage drops on the signal and ground circuits between the sensor and PCM to locate opens or shorts
If wiring is intact, substitute a known-good sensor or simulate the signal with a resistor box to see if the code changes
Clear the code and perform a road test to verify the repair, monitoring live data for normal temperature readings

Don't overlook the intercooler coolant pump

A failing charge air cooler coolant pump can cause the sensor to read incorrectly, but the code may still set as high voltage if the sensor circuit is affected by heat or vibration.
The sensor is often located in a difficult-to-reach area, and technicians may misdiagnose a wiring issue as a sensor failure without proper circuit testing.
High voltage on the signal circuit can also be caused by a poor ground at the sensor, which shifts the reference voltage and is easily missed if only the signal wire is checked.
This code does not always mean the sensor is bad; a short to voltage from a nearby circuit, such as an injector or ignition wire, can induce a false high reading.
After repairs, the PCM may need to relearn the sensor's range, so clearing the code and performing a drive cycle is essential to confirm the fix.

Can I keep driving with P00E1?

It is generally safe to continue driving with this code, but avoid heavy loads or sustained high-speed driving that could stress the charge air cooling system. If the engine enters a reduced power mode or you notice overheating, have the vehicle inspected promptly.

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.