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Engine Controls - Tests W/Codes Expand All (for easy ctrl-f) Collapse All Introduction Self-Diagnostic System Diagnostic Tests * Please Read First * DTC P0101, P0102 & P0103: MAF Sensor Signal DTC P0112 & P0113: IAT Sensor DTC P0115 & P0117: Engine Temperature Sensor DTC P0122 & P0123: Throttle Position (TP) Sensor DTC P0130: Ho2S Ahead Of TWC DTC P0131: Ho2S Ahead Of TWC DTC P0132: Ho2S Ahead Of TWC, Short To Voltage DTC P0133 & P0153: Ho2S Ahead Of TWC DTC P0134: Ho2S Ahead Of TWC Intermittent Signal Interruption, (CYLS. 1-3) DTC P0136: Ho2S After TWC Short Circuit (CYLS. 1-3) DTC P0137: Ho2S After TWC Short To Ground (CYLS. 1-3) DTC P0138: Ho2S After TWC Short To Voltage (CYLS. 1-3) DTC P0139 & P0159: Ho2S After TWC DTC P0140: Ho2S After TWC Open Circuit (CYLS. 1-3) DTC P0150: Ho2S Ahead Of TWC Short Circuit (CYLS. 4-6) DTC P0151: Ho2S Ahead Of TWC Short To Ground (CYLS. 4-6) DTC P0152: Ho2S Ahead Of TWC Short To Voltage (CYLS. 4-6) DTC P0153: Ho2S Ahead Of TWC DTC P0154: Ho2S Ahead Of TWC Open Circuit (CYLS. 4-6) DTC P0156: Ho2S After TWC Short In Wiring (CYLS. 4-6) DTC P0157: Ho2S After TWC Short To Ground (CYLS. 4-6) DTC P0158: Ho2S After TWC Short To Voltage (CYLS. 4-6) DTC P0159: Ho2S After TWC DTC P0160: Ho2S After TWC Open Circuit (CYLS. 4-6) DTC P0300-P0306: Misfire DTC P0326, P0331 & P1386: Knock Sensor Signal Incorrect DTC P0336: Crankshaft Position Sensor Signal Incorrect DTC P0341: Camshaft Position (CMP) Sensor Signal Incorrect DTC P0410 & DTC P1411: Secondary Air Injection System DTC P0420 & P0430: TWC Conversion Too Low DTC P0441: Fuel Tank Ventilation System Malfunction DTC P0444: Fuel Gravity Valve EVAP Canister Purge Valve Open Circuit DTC P0445: Fuel Gravity Valve EVAP Canister Purge Valve Short Circuit DTC P0501: Vehicle Speed Sensor (VSS) Not In Specified Range DTC P0506 & P0507: Idle Air Control (IAC) DTC P0604, P0605 & P1640: ECM Faulty DTC P1102 & P1107: Ho2S Heating Above Upper Limit DTC P1105 & P1110: Ho2S Heating Above Upper Limit DTC P1115 & P1119: Ho2S Heating Below Lower Threshold DTC P1117 & P1121: Ho2S Heating Below Lower Threshold DTC P1123, P1125, P1127 & P1129: Fuel Mixture DTC P1124, P1126, P1128 & P1130: Fuel Mixture DTC P1140: Load Signal DTC P1213-P1218, P1225-P1230 & P1237-P1242: Fuel Injector DTC P1386: Knock Sensor Signal Incorrect DTC P1411: Secondary Air Injection System DTC P1455, P1456 & P1457: A/C Compressor Control DTC P1458: A/C Compressor Control DTC P1501, P1502 & P1541: Fuel Pump Relay End Stage DTC P1510, P1513 & P1514: IAC Valve DTC P1512, P1515 & P1516: Intake Manifold Resonance Flap DTC P1541: Fuel Pump Relay End Stage DTC P1551, P1552 & P1553: IAC Valve/ECM DTC P1570 & P1571: Immobilizer DTC P1593, P1594 & P1595: Intake Manifold Length Tuning DTC P1600 & P1601: Voltage Supply DTC P1602: Voltage Supply, Open Circuit DTC P1610, P1611 & P1614: Mil Activated Externally DTC P1691, P1692 & P1693: Mil DTC P1782: Engine Engagement, Short To Ground In Wiring/ECM