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Trouble Code Identification - Turbo

TROUBLE CODE IDENTIFICATION (TURBO) (1)

CODE No. System Affected MIL inNORMAL MODE MIL in TEST MODE Probable Cause
12  RPM Signal ON N/A Camshaft or Crankshaft Position Sensor or Ckt, Starter or Ckt, ECM
13  RPM Signal (3) (2) Crankshaft Position Sensor or Ckt, ECM
14  Ignition Signal ON N/A Ignitor or Ckt to ECM. ECM
16  Elect. Controlled A/T Signal ON N/A ECM or Ckt
21  O2 Sensor Signal ON (4) O2 Sensor or Ckt, ECM
22  Coolant Temp. Sensor Signal ON ON Coolant Temp. Sensor or Ckt, ECM
24  Intake Air Temp. Sensor Signal ON ON Intake Air Temp. Sensor or Ckt, ECM
25  Lean Air/Fuel Mixture ON ON Loose Ground, Injector or Ckt, Fuel Pressure, Ignition System, Coolant Temp. Sensor,Airflow Meter, Vacuum Sensor,O2 Sensor or Ckt, CompressionPressure, ECM
26  Rich Air/Fuel Mixture ON ON Loose Ground, Injector or Ckt, Fuel Pressure, Ignition System, Coolant Temp. Sensor,Airflow Meter, Vacuum Sensor,O2 Sensor or Ckt, Cold Start Injector or Ckt, Compression Pressure, ECM
27  Sub-O2 Sensor Signal ON (4) Sub-O2 Sensor or Ckt, ECM
31  Airflow Meter ON ON Airflow Meter or Ckt, ECM
34  Turbocharging Pressure Signal ON N/A Turbocharging Pressure Sensor or Ckt, ECM
35  Turbo Pressure/ BARO Sensor ON ON Turbocharging Pressure Sensor or Ckt, ECM
41  TPS Signal ON ON Throttle Position Sensor or Ckt, ECM
42  Vehicle Speed Sensor Signal OFF OFF Vehicle Speed Sensor or Ckt, ECM
43  Starter Signal N/A OFF Starter Signal Ckt, Main Relay, Ignition Switch or Ckt, ECM
47 Sub-TPS Signal OFF ON Sub-Throttle Position Sensor or Ckt, ECM
51  Switch Condition Signal N/A OFF A/C Switch, Park/Neutral Switch or Ckt, TPS or Ckt, ECM
52  Front Knock Sensor Signal ON N/A Front Knock Sensor or Ckt, ECM
53  Knock Control Signal ON N/A ECM
55  Rear Knock Sensor Signal ON N/A Rear Knock Sensor or Ckt, ECM
71  EGR System Malfunction ON ON EGR System, EGR Temp. Sensor or Ckt, EGR-VSV, ECM
78  Fuel Pump Control Signal OFF ON Fuel Pump ECU or Ckt, Fuel Pump, ECM Power Source, ECM
(1) ON indicates MIL on instrument panel will be illuminated. N/A indicates item is not included in malfunction diagnosis when using this mode. OFF indicates MIL on instrument panel will be not be illuminated even if malfunction is detected.
(2) If "NE" signal does not pulse 12 times to ECM during interval between "G1" and "G2" pulses, MIL will illuminate.
(3) The MIL will be illuminated if no "NE" signal to ECM is received at 1000 RPM or if deviation in "G", "G1", "G2" or "NE" signal exists during idling with engine warm.
(4) The MIL will be illuminated if problem exists in oxygen sensor circuit. The MIL will not be illuminated if problem exists in oxygen sensor heater or circuit.
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