P2039
Reductant Injection Air Pressure Sensor A Circuit Low
P2039 is an OBD-II diagnostic trouble code meaning: Reductant Injection Air Pressure Sensor A Circuit Low. Common causes: air pressure sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $33–89.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- Increased NOx emissions
- Possible problems starting the engine
Causes
- Air pressure sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Problems with the SCR control unit
- Air tubes are dirty or damaged
How to Fix
- Check the integrity of the wiring to the sensor
- Check the connections and contacts of the sensor connector
- Measure the resistance and voltage of the sensor
- Replace faulty air pressure sensor
- Check air pipes for blockages or damage
Related codes
Error P2039 by Vehicle Brand
FAQ
What does the P2039 code mean?
P2039 is an OBD-II diagnostic trouble code that indicates: Reductant Injection Air Pressure Sensor A Circuit Low
What causes a P2039 error code?
The most common causes of P2039 include: Air pressure sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Problems with the SCR control unit.
How do I fix a P2039 diagnostic trouble code?
To fix P2039: Check the integrity of the wiring to the sensor. Check the connections and contacts of the sensor connector. Measure the resistance and voltage of the sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2039?
Yes, but get it checked soon
How much does it cost to fix P2039?
The estimated repair cost for P2039 is $33–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat