Low severity
P0072Low voltage in the external temperature sensor circuit (Circuit A)
Part
External temperature sensor
Part price
$10
At a workshop
$35
You save
$25
How to read code P0072
P
System
Powertrain (engine and transmission)
0
Code type
Generic code (SAE / OBD-II)
0
Subsystem
General system / auxiliary measurement
72
Fault number
Specific fault within the subsystem
Symptoms
- Dashboard shows extreme cold
- Temperature sensor error code
- Automatic air conditioning not engaging
Possible causes
- Grounding issue in the wiring harness
- Faulty sensor (internal short circuit)
- Water-damaged connector
Diagnostic steps
- 1Disconnect the connector and check if the error code changes to a high state
- 2Inspect the wiring harness for shorts to ground
- 3Check the condition of the pins in the connector
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Frequently asked questions about P0072
What does code P0072 mean?
P0072: Low voltage in the external temperature sensor circuit (Circuit A).
What are the symptoms of code P0072?
Dashboard shows extreme cold; Temperature sensor error code; Automatic air conditioning not engaging.
What causes code P0072?
Grounding issue in the wiring harness; Faulty sensor (internal short circuit); Water-damaged connector.
Can I drive with code P0072?
SAFE TO DRIVE – The fault does not immobilise the car, but diagnose it as soon as possible.
How much does it cost to fix code P0072?
The part (External temperature sensor) costs about $10, and a mechanic’s labour about $25.
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