DTC [WITH WU-TWC]

Steering angle

Steering angle sensor circuit malfunction (C1277)

• The PCM monitors input voltage from the steering angle sensor. If the input voltage at PCM terminal 1M or 1R is 4.9 V or more or 0.1 V or less, the PCM determines that the steering angle sensor circuit has a malfunction..

MAP Sensor

MAP sensor circuit low input (P0107)

• The PCM monitors input voltage from the MAP sensor. If the input voltage at PCM terminal 2S is less than 0.1 V, the PCM determines that the MAP sensor circuit has a malfunction.

MAP sensor circuit high input (P0108)

• The PCM monitors the input voltage from the MAP sensor. If the input voltage at PCM terminal 2S is more than 4.8 V, the PCM determines that the MAP sensor circuit has a malfunction.

Fuel System (Without EGR System)

Fuel trim system too lean (P0171)

• The PCM monitors the short term fuel trim (SHRTFT) and the long term fuel trim (LONGFT) values during the closed loop fuel control. If the fuel trim exceeds the preprogrammed criteria, the PCM determines that the fuel system is too lean.

Fuel trim system too rich (P0172)

• The PCM monitors the short fuel trim (SHRTFT) and long fuel trim (LONGFT) values during the closed loop fuel control. If the LONGFT and the sum total of these fuel trims exceeds the preprogrammed criteria, the PCM determines that the fuel system is too rich.

Fuel System (With EGR System)

Fuel trim system too lean off idle (P2177)

• The PCM monitors short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) during closed loop fuel control at off idle. If the LONGFT and the sum total of these fuel trims exceed preprogrammed criteria, PCM determines that fuel system is too lean during off-idle.

Fuel trim system too rich off idle (P2178)

• The PCM monitors short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) during closed loop fuel control at off idle. If the LONGFT and the sum total of these fuel trims exceed the preprogrammed criteria, PCM determines that fuel system is too rich at off-idle.

Fuel trim system too lean at idle (P2187)

• The PCM monitors short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) during the closed loop fuel control at idle. If the LONGFT and the sum total of these fuel trims and correction exceed the preprogrammed criteria, the PCM determines that the fuel system is too lean during idle.

Fuel trim system too rich at idle (P2188)

• The PCM monitors the short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) during the closed loop fuel control at idle. If the LONGFT and the sum total of these fuel trims exceed the preprogrammed criteria, the PCM determines that fuel system is too rich at idle.

EGR system

EGR flow insufficient detected (P0401)

• The PCM monitors the difference in intake manifold pressures when the EGR is operated and stopped. If the difference is the small, the PCM determines that the EGR flow is insufficient.

EGR control circuit problem (P0403)

• The PCM monitors the input voltage from the EGR valve. If the voltages at PCM terminals 2Z, 2V, 2R and/or 2N remain low or high, the PCM determines that the there is a EGR control circuit problem.