Daewoo: Lanos 1.6L – Nubira 2.0L (2000 – 2002)

Model Year Engine identification System
Lanos 1.6L 2000-02 A16DM IEFI-6/ITMS-6F
Nubira 2.0L 2000-02 T20XED IEFI-6/ITMS-6F

General information

  • Engine control module (ECM) incorporates self-diagnosis function.
  • Malfunction indicator lamp (MIL) will illuminate if certain faults are recorded.
  • ECM operates in backup mode if sensors fail, to enable vehicle to be driven to workshop.


Trouble codes can be displayed by using a Scan Tool connected to the data link connector (DLC):

o Lanos – [1]
o Nubira – [2]


  • Ensure ignition switched OFF.
  • Disconnect battery ground lead.
  • Wait 10 seconds minimum.
  • Reconnect battery ground lead.

NOTE: Disconnecting battery ground lead may also erase memory from electronic units such as radio.

  • The engine control module (ECM) fault memory can also be erased using diagnostic equipment connected to the data link connector (DLC).

Trouble code  identification

OBD·II code Fault location Probable cause
PO,P2,UO Refer to OBD·II trouble code tables
P1106 Manifold absolute pressure (MAP) sensor – intermittent voltage high Wiring short to positive, MAP sensor
P1107 Manifold absolute pressure (MAP) sensor – intermittent voltage low Wiring short to ground, MAP sensor
P1109 Intake manifold air control valve – circuit malfunction Wiring, intake manifold air control valve, ECM
P1111 Intake air temperature (IAT) sensor- intermittent voltage high Wiring short to positive, IAT sensor
P1112 Intake air temperature (IAT) sensor- intermittent voltage low Wiring short to ground, IAT sensor
P1114 Engine coolant temperature (ECT) sensor- intermittent voltage low Wiring short to ground, ECT sensor
P1115 Engine coolant temperature (ECT) sensor – intermittent voltage high Wiring short to positive, ECT sensor
P1121 Throttle position (TP) sensor – voltage high Wiring short to positive, ECT sensor
P1122 Throttle position (TP) sensor – voltage low Wiring short to ground, ECT sensor
P1130 Oxygen sensor (02S) 1, bank 1 – too long to respond Wiring, 025
P1133 Oxygen sensor (02S) 1, bank 1 – slow response Wiring, fuel pressure, leaking injector, MAP sensor, TP sensor, 025
P1134 Oxygen sensor (02S) 1, bank 1 -transition ratio Wiring, 025
·P1167 Oxygen sensor (02S) 1, bank 1 – rich in deceleration fuel cut-off Fuel system, fuel pressure regulator, leaking injector(s)
P1171 Fuel trim, under load – mixture too lean 025, fuel pressure, fuel system, mechanical fault, ECM
P1181 Intake manifold air control solenoid – voltage low Wiring open circuit/short to ground, intake manifold air control solenoid
P1182 Intake manifold air control solenoid – voltage high Wiring open circuit/short to positive, intake manifold air control solenoid
P1230 Fuel pump relay- voltage low Wiring open circuit/short to ground, fuel pump relay
P1231 Fuel pump relay – voltage high Wiring open circuit/short to positive, fuel pump relay
P1320 Crankshaft position (CKP) sensor- signal adaptation at limit Wiring, CKP sensor
P1321 Crankshaft position (CKP) sensor – incorrect signal Wiring, CKP sensor
P1336 Crankshaft position (CKP) sensor – variation not learned Learning procedure not performed
P1380 Rough road signal – malfunction ABS control module trouble code(s) stored, and or engine misfire present
P1381 Rough road signal – no communication from ABS CAN data bus Wiring open circuit, ABS system, and/or engine misfire present
P1382 Rough road signal – invalid data Wiring, ABS system
P1385 Variable reluctance sensor, without ABS – circuit malfunction Wiring, variable reluctance sensor
P1391 Rough road G-force sensor – implausible signal Wiring, G-force sensor, CM
P1392 Rough road G-force sensor – voltage low Wiring open circuit/short to ground, G-force sensor, ECM
P1393 Rough road G-force sensor – voltage high Wiring short to positive, G-force sensor, ECM
P1396 WSSD rough road system – malfunction Wiring, G-force sensor, ECM
P1397 WSSD rough road – detected/malfunction Wiring, G-force sensor, ABS control module, ECM
P1402 Exhaust gas recirculation (EGR) valve – blocked Wiring, EGR valve
P1403 Exhaust gas recirculation (EGR) valve – malfunction Wiring, EGR valve
P1404 Exhaust gas recirculation (EGR) valve – range/performance problem Wiring, EGR valve
P1504 Vehicle speed sensor (VSS), AT- no signal Wiring, transmission control module, VSS
P1511 Idle speed control {ISC) actuator – circuit malfunction Wiring, ISC actuator
P1512 Idle speed control (ISC) actuator- malfunction ISC actuator
P1513 Idle speed control (ISC) actuator -functional diagnosis malfunction Wiring, ISC actuator, ECM
P1537 A/C compressor clutch relay – voltage high Wiring short to positive, A/C compressor clutch relay
P1538 A/C compressor clutch relay – voltage low Wiring short to ground, AIC compressor clutch relay
P1546 AIC compressor clutch, signal – circuit malfunction Wiring, A/C compressor clutch relay
P1601 Engine control module (ECM)/transmission control module (TCM) – serial peripheral communication malfunction Wiring, ECM, TCM
P1607 ECM, lower power counter 1/C – reset/ malfunction ECM
P1610 Engine control (EC) relay – voltage high Wiring open circuit/short to positive, EC relay
P1611 Engine control (EC) relay – voltage low Wiring short to ground, EC relay
P1618 Serial peripheral interface, ECM – communication diagnostics ECM/TCM
P1626 Immobilizer system – malfunction No authorization code
P1627 Transmission control module/engine control module (ECM) -AID conversion malfunction TCM/ECM
P1628 Immobilizer system – communication malfunction Wiring, immobilizer control module, engine control module (ECM)
P1629 Immobilizer system – malfunction Incorrect authorization code
P1631 Immobilizer system – malfunction Incorrect authorization code
P1635 Engine control module (ECM), sensor reference voltage low Wiring, ECM
P1640 Engine control module (ECM), output driver modules – malfunction Wiring, ECM
P1650 Engine control module (ECM), SPI communication with SIDM chip – malfunction Wiring, ECM
P1655 Engine control module (ECM), SPI communication with PSVI chip – malfunction Wiring, ECM
P1660 Malfunction indicator lamp (MIL) -voltage high Wiring open circuit/short to positive, MIL
P1661 Malfunction indicator lamp (MIL) – voltage low Wiring short to ground, MIL
P1671 CAN data bus, TCM communication – missing Wiring, ECM, TCM
P1672 CAN data bus – bus off mode detected
P1673 CAN data bus – communication malfunction Wiring, ECM, TCM