CAR OBD CODES
OBD/DTC Search, e.g.P1128
CAR OBD CODES P1128
P1128 OBD Code Definition:
P1128 Manifold Absolute Pressure Sensor Signal Lower Than Expected
P1128 OBD Code Description:
– Faulty Manifold Absolute Pressure (MAP) sensor
– Manifold Absolute Pressure (MAP) sensor harness is open or shorted
– Manifold Absolute Pressure (MAP) sensor circuit poor electrical connection Possible Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1128 OBD Code Description
The Manifold Absolute Pressure (MAP) sensor senses manifold absolute pressure (vacuum) and converts it into electrical signals. The MAP sensor outputs low signal voltage at high-vacuum (idling) and high signal voltage at low-vacuum (throttle valve wide open).
The engine control module (ECM) compares a predetermined MAP value at a given throttle position and manifold absolute pressure to the output voltage value of the MAP sensor.
If the MAP sensor outputs lower voltage than expected, the ECM detects a malfunction and stores a DTC.
Possible Solutions- Check Mass Air Flow (MAF) Sensor
- Check Oxygen Sensor Control
- Check Oxygen Sensor(s)
- Check Fuel Injector(s)
Note: The information on the P1128 error code is purely informative, if you need more useful information, please consult your technician.
OBDII Body Codes
B1708 B1604 B2C94 B00B6 B1618 B118A B1253 B1881 B2075 P0BB0 B2451 B1573 B1425 B2065 B12A6 OBDII Chassis Codes
C1145 C1860 C0237 C1252 C1474 C199A C2777 C1325 C1450 C0628 C1290 C1979 C198A C1755 C1216 OBDII Network Codes
U0214 U1019 U2000 U2003 U1133 U0240 U0547 U0003 U1053 U0145 U0504 U0068 U1039 U1225 U0062 OBDII Powertrain Codes
P2043 P20D0 P1270 P1742 P092C P2160 P021A P1498 P0B94 P2195 P0A95 P20DE P1004 P0AF4 P1897
B1708 B1604 B2C94 B00B6 B1618 B118A B1253 B1881 B2075 P0BB0 B2451 B1573 B1425 B2065 B12A6 OBDII Chassis Codes
C1145 C1860 C0237 C1252 C1474 C199A C2777 C1325 C1450 C0628 C1290 C1979 C198A C1755 C1216 OBDII Network Codes
U0214 U1019 U2000 U2003 U1133 U0240 U0547 U0003 U1053 U0145 U0504 U0068 U1039 U1225 U0062 OBDII Powertrain Codes
P2043 P20D0 P1270 P1742 P092C P2160 P021A P1498 P0B94 P2195 P0A95 P20DE P1004 P0AF4 P1897
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