Check Engine/Malfunction Indicator Lamp (MIL)

As a functional test, the Malfunction Indicator Lamp (MIL) illuminates at key-on before engine cranking.

Whenever the Powertrain Control Module (PCM) sets a diagnostic trouble code that effects vehicle emissions, it illuminates the MIL.

The PCM illuminates the MIL only for diagnostic trouble codes that effect vehicle emissions.

The MIL remains on until the diagnostic trouble code is erased.

The MIL either flashes or illuminates continuously when the PCM detects active engine misfire.

During active misfire, the PCM records the current engine operating conditions. The engine operating conditions are recorded by the PCM.

Items Indicated by the Check Engine/Malfunction Indicator Lamp:

DTC No. Items
O1 (P0340) No cam signal at PCM
02 (P0605) Internal controller failure
17 (P0403) EGR solenoid circuit
18 (P0443) EVAP solenoid circuit
19 (P0203) Injector #3 control circuit
20 (P0202) Injector #2 control circuit
21 (P0201) Injector #1 control circuit
25 (P0505) Idle air control motor circuit
26 (P0122) Throttle position sensor voltage low
27 (P0123) Throttle position sensor voltage high
30 (PO117) Engine coolant temperature voltage too low
31 (P0118) Engine coolant temperature voltage too high
32 (P0134) Rear bank upstream HO2S stays at center
35 (P0500) No vehicle speed sensor signal
36 (P0107) MAP sensor voltage too low
37 (P0108) MAP sensor voltage too high
39 (P1297) No change in MAP from start to run
43 (P0351) Ignition coil No.1 primary circuit
46 (P0401) EGR system failure
57 (P0112) Intake air temperature sensor voltage low
58 (P0113) Intake air temperature sensor voltage high
61 (P0204) Injector #4 control circuit
62 (PO132) Rear bank upstream HO2S shorted to voltage
65 (P0154) Front bank upstream HO2S stays at center
66 (P0152) Front bank upstream HO2S shorted to voltage
68 (P0600) PCM failure SPI communications
69 (P0205) Injector #5 control unit
70 (P0206) Injector #6 control unit
71 (-) Battery temperature sensor volts out of limit
92 (P1490) Low speed fan control relay circuit
93 (P1489) High speed condenser fan control relay circuit
101 (P0220) Fuel pump relay control circuit
102 (P0133) Rear bank upstream HO2S slow response
103 (P0135) Rear bank upstream HO2S heater failure
105 (P0141) Rear bank downstream HO2S heater failure
106 (P0300) Multiple cylinder misfire*
107 (P0301) Cylinder #1 misfire*
108 (P0302) Cylinder #2 misfire*
109 (P0303) Cylinder #3 misfire*
110 (P0304) Cylinder #4 misfire
112 (P0422) Rear bank catalytic converter efficiency failure
113 (P0441) EVAP purge flow monitor failure
114 (P1899) Park/neutral position switch failure
118 (P0172) Rear bank fuel system rich
119 (P0171) Rear bank fuel system lean
120 (P0175) Front bank fuel system rich*
121 (P0174) Front bank fuel system lean*
122 (P0153) Front bank upstream HO2S slow response
124 (P0175) Front bank upstream HO2S heater failure
125 (P0161) Front bank downstream HO2S heater failure
126 (P0138) Rear bank downstream HO2S shorted to voltage
127 (P0158) Front bank downstream HO2S shorted to voltage
128 (P0125) Closed loop temperature not reached
129 (P0140) Rear bank downstream HO2S stays at center
130 (P0160) Front bank downstream HO2S stays at center
132 (P0121) TPS voltage does not agree with MAP
146 (P1496) 5 volts supply output too low
153 (P1493) Battery temperature sensor voltage too low
154 (P1492) Battery temperature sensor voltage too high
155 (P0131) Rear bank upstream HO2S shorted to ground
156 (P0137) Rear bank downstream HO2S shorted to ground
157 (P1391) Intermittent loss of CMP or CKP
160 (P0442) EVAP leak monitor small leak detected
161 (P0455) EVAP leak monitor large leak detected
174 (P0305) Cylinder #5 misfire
175 (P0306) Cylinder #6 misfire
180 (P0432) Front bank catalytic converter efficiency failure
181 (P0151) Front bank upstream HO2S shorted to ground
182 (P0157) Front bank downstream HO2S shorted to ground
183 (P1495) Evaporative emission ventilation solenoid circuit
184 (P1494) Evaporative emission ventilation solenoid switch or mechanical fault
187 (P1486) EVAP leak monitor pinched hose found
197 (P1498) High speed radiator fan ground control relay circuit

NOTES:

1. After the Power Train Control Module (PCM) detects a malfunction, the check engine/malfunction indicator lamp illuminates when the engine is next turned on and the same malfunction is re-detected.

- However, for items marked with a "*", the check engine/malfunction indicator lamp illuminates on the first detection of the malfunction.

2. After the check engine/malfunction indicator lamp illuminates, it will be switched off under the following conditions:
- When the ECM monitored the powertrain malfunction three times* and detected no malfunction.
*: In this case, one time indicates from engine start to stop.

- For misfiring or a fuel trim malfunction, when driving conditions (engine speed, engine coolant temperature, etc.) are similar to those when the malfunction was first recorded. In addition, the ECM has detected no malfunction.

CAUTION: If the check engine/malfunction indicator lamp illuminates because of a malfunction of the PCM, communication between the scan tool and the PCM cannot occur. In this case, the diagnostic trouble code cannot be read.