Jim Taddei
Jim Taddei has been in the automotive field since 1975 and has over 25 years of experience with General Motors products, achieving the designation of GM Master Technician. He is also currently certified as an ASE Master Technician, and holds an Advanced California Smog Check License. He has been the lead technician and team leader at a multi-line dealership. After leaving the dealership he spent a couple of years working in an independent shop and now uses his experience and expertise to help verify the quality of RepairPal Certified shops.
Posts by Jim Taddei
A/C Evaporator Temperature sensor circuit error (high temp indicated) The ECM monitors the A/C Evaporator Temperature sensor circuit. If the evaporator temperature is to high the ECM will not allow the A/C compressor to operate.
A/C Evaporator Temperature sensor circuit error (high temp indicated) The ECM monitors the A/C Evaporator Temperature sensor circuit. If the evaporator temperature is to high the ECM will not allow the A/C compressor to operate.
Vehicle Speed sensor signal circuit error The Vehicle Speed Sensor signals to the ECM the current speed at which the vehicle is traveling. The ECM uses this information to help determine the correct gear ratio for the transmission and when to engage the transmission torque converter lock-up.
Vehicle Speed sensor signal circuit error The Vehicle Speed Sensor signals to the ECM the current speed at which the vehicle is traveling. The ECM uses this information to help determine the correct gear ratio for the transmission and when to engage the transmission torque converter lock-up.
Digital EGR solenoid #1 circuit error On vehicles with three solenoid EGR valves an open or short on the solenoid 1 circuit will set code 75. Fault Code Description 75 - Digital EGR solenoid #1 circuit error Symptoms EGR solenoid 1 will not function Common Problems Broken wire to EGR valve Faulty EGR valve .
Digital EGR solenoid #1 circuit error On vehicles with three solenoid EGR valves an open or short on the solenoid 1 circuit will set code 75. Fault Code Description 75 - Digital EGR solenoid #1 circuit error Symptoms EGR solenoid 1 will not function Common Problems Broken wire to EGR valve Faulty EGR valve .
Digital EGR solenoid #2 circuit error On vehicles with three solenoid EGR valves an open or short on the solenoid 2 circuit will set code 76. Fault Code Description 76 - Digital EGR solenoid #2 circuit error Symptoms EGR solenoid 2 will not function Common Problems Broken wire to EGR valve Faulty EGR valve .
Digital EGR solenoid #2 circuit error On vehicles with three solenoid EGR valves an open or short on the solenoid 2 circuit will set code 76. Fault Code Description 76 - Digital EGR solenoid #2 circuit error Symptoms EGR solenoid 2 will not function Common Problems Broken wire to EGR valve Faulty EGR valve .
Digital EGR solenoid #3 circuit error On vehicles with three solenoid EGR valves an open or short on the solenoid 3 circuit will set code 77. Fault Code Description 77 - Digital EGR solenoid #3 circuit error Symptoms EGR solenoid 3 will not function Common Problems Broken wire to EGR valve Faulty EGR valve .
Digital EGR solenoid #3 circuit error On vehicles with three solenoid EGR valves an open or short on the solenoid 3 circuit will set code 77. Fault Code Description 77 - Digital EGR solenoid #3 circuit error Symptoms EGR solenoid 3 will not function Common Problems Broken wire to EGR valve Faulty EGR valve .
Transmission fluid over temperature The ECM monitors the automatic transmissionfluid temperature via the transmission fluid temperature sensor. If the transmission fluid reaches a predetermined limit, code 79 will be set.
Transmission fluid over temperature The ECM monitors the automatic transmissionfluid temperature via the transmission fluid temperature sensor. If the transmission fluid reaches a predetermined limit, code 79 will be set.
Transmission component slipping The ECM monitors the speed of the input and output shafts of the transmission and calculates the effective gear ratio at any given time. If the calculated gear ratio does not match the expected gear ratio for the currently selected gear code 80 will be set.
Transmission component slipping The ECM monitors the speed of the input and output shafts of the transmission and calculates the effective gear ratio at any given time. If the calculated gear ratio does not match the expected gear ratio for the currently selected gear code 80 will be set.
3x Crankshaft Position sensor circuit error The ECM receives a signal from the Crankshaft Position sensor depending on the engine speed. The ECM uses information from this sensor to help calculate fuel delivery and spark timing.
3x Crankshaft Position sensor circuit error The ECM receives a signal from the Crankshaft Position sensor depending on the engine speed. The ECM uses information from this sensor to help calculate fuel delivery and spark timing.
OBD I Code 85 - PROM error If the ECM detects an internal fault with the PROM code 85 will set. The PROM is a special "chip" that is installed in the ECM, based on the particular vehicle configuration.
OBD I Code 85 - PROM error If the ECM detects an internal fault with the PROM code 85 will set. The PROM is a special "chip" that is installed in the ECM, based on the particular vehicle configuration.
EEPROM error (flash memory error) If the ECM detects an internal fault with the EEPROM code 87 will set. The EEPROM is a special "chip" that is installed in the ECM, based on the particular vehicle configuration.
EEPROM error (flash memory error) If the ECM detects an internal fault with the EEPROM code 87 will set. The EEPROM is a special "chip" that is installed in the ECM, based on the particular vehicle configuration.
Torque Converter Clutch Error The ECM monitors the operation of the Torque Converter Clutch. Code 90 will set when the Torque Converter Clutch operation does not meet factory specifications.
Torque Converter Clutch Error The ECM monitors the operation of the Torque Converter Clutch. Code 90 will set when the Torque Converter Clutch operation does not meet factory specifications.
Transmission Pressure Control solenoid circuit error The ECM monitors the amperage draw of the transmission pressure control solenoid. Code 93 will set when the amperage draw does not meet factory specifications.
Transmission Pressure Control solenoid circuit error The ECM monitors the amperage draw of the transmission pressure control solenoid. Code 93 will set when the amperage draw does not meet factory specifications.
Transmission system voltage low The ECM monitors the voltage available to the transmission solenoids. Code 96 will set when the voltage does not meet factory specifications.
Transmission system voltage low The ECM monitors the voltage available to the transmission solenoids. Code 96 will set when the voltage does not meet factory specifications.
Invalid PCM program If the PCM detects a problem with its software code 98 will be set. Fault Code Description 98 - Invalid PCM program Symptoms Engine may not start Common Problems PCM should be reprogrammed in possible .
Invalid PCM program If the PCM detects a problem with its software code 98 will be set. Fault Code Description 98 - Invalid PCM program Symptoms Engine may not start Common Problems PCM should be reprogrammed in possible .
Invalid PCM program If the PCM detects a problem with its software code 99 will be set. Fault Code Description 99 - Invalid PCM program Symptoms Engine may not start Common Problems PCM should be reprogrammed in possible .
Invalid PCM program If the PCM detects a problem with its software code 99 will be set. Fault Code Description 99 - Invalid PCM program Symptoms Engine may not start Common Problems PCM should be reprogrammed in possible .