2001 Hyundai Elantra Trouble Code P0105

ERYNANDIRELYN

MEMBER
2001 HYUNDAI ELANTRA
4 CYL
FWD
AUTOMATIC
115,000 MILES

I know that the code P0105 comes back to Barometric Pressure Circuit, but what is it? Is it a sensor? Where is it located, and how much does it typically cost to fix?

Sunday, March 1st, 2009 AT 1:59 PM

1 Reply

ZACKMAN

MECHANIC
4,202 POSTS

BAro Sensor is your MAP sensor.

Run this diagnostic.

Test Procedures
1. Check if DTC P0110 is set in addition to DTC P0105 or P0106. If DTC P0110 is set, go to next
step. If DTC P0110 is not set, go to step 3.
2. Turn ignition off. Disconnect MAP sensor 4-pin connector. Measure resistance between ground
and MAP sensor connector terminal No. 4 (Green wire). If resistance is one ohm or less, replace
MAP sensor. If resistance is more than one ohm, repair open in Green wire between MAP sensor
and ECM connector terminal No. 48. After repairs, clear DTC and verify MAP sensor operation.
3. Turn ignition off. Disconnect MAP sensor 4-pin connector. Measure resistance between MAP
sensor connector terminals No. 1 and 4 (component side). Resistance should be about 30,000
ohms. If resistance is as specified, go to next step. If resistance is not as specified, replace MAP
sensor. After repairs, clear DTC and verify MAP sensor operation.
4. Turn ignition on. Measure voltage between ground and MAP sensor connector terminal No. 2
(Red wire). Voltage should be about 5 volts. If voltage is as specified, go to next step. If voltage is
not as specified, repair open in Red wire between ECM connector terminal no. 44 and MAP
sensor connector terminal No. 2. After repairs, clear DTC and verify MAP sensor operation.
5. Turn ignition off. Disconnect ECM 63-pin connector. Check for continuity between ground and
MAP sensor connector terminal No. 1 (Green wire). If continuity does not exist, go to next step. If
continuity exists, repair short to ground in Green wire between MAP sensor and ECM. After
repairs, clear DTC and verify MAP sensor operation.
6. Reconnect MAP sensor connector and ECM connector. Turn ignition on. Backprobe MAP sensor
connector and measure voltage between ground and MAP sensor connector terminal No. 1 (Green
wire). Voltage should be 0.2-4.5 volts. If voltage is as specified, go to next step. If voltage is not
as specified, replace MAP sensor. After repairs, clear DTC and verify MAP sensor operation.
7. Check ECM connector for loose or damaged terminals. If problem exists, repair ECM connector.
If problem does not exist, replace MAP. Clear DTC and verify system operation. If problem still
exists, replace ECM. After repairs, clear DTC and verify system operation.