Labels:text | screenshot | document | font | number OCR: CODE IDENTIFICATION The "Service Engine Soon" light will only be "ON" if the malfunction exists under the conditions listed below. If the malfunction clears, the light will go out and the code will be stored in the ECM. Any Codes stored will be erased if no problem reoccurs within 50 engine starts. CODE AND CIRCUIT PROBABLE CAUSE CODE AND CIRCUIT PROBABLE CAUSE Code 12 - No engine speed No engine speed sensor Code 31 - MAP Sensor Too Absolute Pressure reference pulse. reference pulses to the Low (MAP) circuit signal ECM This code is not voltage too low. stored in memory and Engine must run at curb will only flash while the idle for 10 seconds fault is present. Normal before this code will set code with ignition "ON," engine not running. Code 32 - EGR Exhaust Gas Code 14 - Coolant Sensor Sets if the sensor or Loop Error Recirculation (EGR) High Temperature signal line becomes vacuum circuit has seen Indication grounded for 10 improper EGR vacuum. seconds Vehicle must be running at road speed Code 15 - Coolant Sensor Sets if the sensor, approximately 30 mph Low Temperature connections, or wires (48 Km/h) for 10 Indication open for 10 seconds seconds before this code will set. Code 21 - TPS Signal Voltage High Throttle Position Sensor (TPS) circuit voltage Code 33 - MAP Sensor Absolute Pressure high (open circuit or Too High (MAP) circuit signal misadjusted TPS) voltage too high. Engine must run 30 Engine must run at curb seconds, at curb idle idle for 10 seconds speed, before this code before this code will set. will set Code 51 - PROM Faulty or improperly Code 22 - TPS Throttle Position Sensor installed PROM. It takes Signal Voltage Low (TPS) circuit voltage low approximately 10 (grounded circuit). seconds before this Engine must run 2 code will set. minutes at 1250 rpm or above before this code Code 52 - ECM Fault in ECM circuit. It will set. takes 10 seconds before this code will set Code 23 - TPS Throttle Position Sensor Not Calibrated (TPS) circuit. Voltage Code 53 - Five volt S volt reference (Vref) not between 25 and 1.3 Reference Overload circuit overloaded volts at curb idle speed. (grounded circuit). It Engine must run for 30 takes 10 seconds before seconds, at curb idle, this Code will set. before this code will set Code 24 - VSS Vehicle speed sensor No Vehicle Speed (VSS) circuit (open or Indication grounded circuit) Vehicle must operate at road speed for 10 seconds before this code will set
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