Low severity
P0038High voltage in the heater circuit of the O2 sensor (Bank 1, Sensor 2)
Part
O2 sensor downstream of the catalytic converter
Part price
$75
At a workshop
$100
You save
$25
How to read code P0038
P
System
Powertrain (engine and transmission)
0
Code type
Generic code (SAE / OBD-II)
0
Subsystem
General system / auxiliary measurement
38
Fault number
Specific fault within the subsystem
Symptoms
- Check engine light
- No other symptoms during driving
Possible causes
- Short to power (positive battery terminal) in the heater circuit
- Internal short in the O2 sensor
- Engine mass issue
Diagnostic steps
- 1Inspect the electrical circuit for shorts
- 2Check the engine mass and controller
- 3Replace the O2 sensor with a functioning one
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Frequently asked questions about P0038
What does code P0038 mean?
P0038: High voltage in the heater circuit of the O2 sensor (Bank 1, Sensor 2).
What are the symptoms of code P0038?
Check engine light; No other symptoms during driving.
What causes code P0038?
Short to power (positive battery terminal) in the heater circuit; Internal short in the O2 sensor; Engine mass issue.
Can I drive with code P0038?
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 P0038?
The part (O2 sensor downstream of the catalytic converter) costs about $75, and a mechanic’s labour about $25.
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