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
Quad Driver Module (QDM B) Error The ECM uses "quad drivers" to control its output devices. Each quad driver is capable of controlling up to four devices.
Quad Driver Module (QDM B) Error The ECM uses "quad drivers" to control its output devices. Each quad driver is capable of controlling up to four devices.
Boost control error The ECM monitors turbocharger boost using the MAP sensor input. If turbocharger boost is to high or too low code 57 will be set.
Boost control error The ECM monitors turbocharger boost using the MAP sensor input. If turbocharger boost is to high or too low code 57 will be set.
Trans Fluid Temperature sensor circuit error (low voltage) VATS (Vehicle Anti-theft System) error Depending on the model, code 58 can refer to two different systems. Please choose from one of the above links for specific information on each system.
Trans Fluid Temperature sensor circuit error (low voltage) VATS (Vehicle Anti-theft System) error Depending on the model, code 58 can refer to two different systems. Please choose from one of the above links for specific information on each system.
Trans Fluid Temperature sensor circuit error (high voltage) The ECM monitors the transmission fluid temperature sensor and can adjust the transmission operation based on the fluid temperature. If the circuit is open code 59 will set.
Trans Fluid Temperature sensor circuit error (high voltage) The ECM monitors the transmission fluid temperature sensor and can adjust the transmission operation based on the fluid temperature. If the circuit is open code 59 will set.
A/C system performance The ECM monitors the A/C compressor operation, excess cycling of the A/C compressor will cause code 61 to set. Fault Code Description 61 -A/C system performance Symptoms Poor A/C performance Common Problems Low refrigerant charge due to system leak .
A/C system performance The ECM monitors the A/C compressor operation, excess cycling of the A/C compressor will cause code 61 to set. Fault Code Description 61 -A/C system performance Symptoms Poor A/C performance Common Problems Low refrigerant charge due to system leak .
Oxygen sensor circuit open or no activity The Oxygen Sensor monitors the oxygen content of the exhaust. By monitoring oxygen content, the Oxygen Sensor can tell the Engine Control Computer if too much or not enough fuel is being burned in the cylinders so the ECM can adjust the fuel mixture accordingly.
Oxygen sensor circuit open or no activity The Oxygen Sensor monitors the oxygen content of the exhaust. By monitoring oxygen content, the Oxygen Sensor can tell the Engine Control Computer if too much or not enough fuel is being burned in the cylinders so the ECM can adjust the fuel mixture accordingly.
Right bank O2 sensor rich exhaust indicated The ECM receives a signal from the O2 sensor based on the amount of oxygen in the exhaust. If there is little oxygen in the exhaust, it is in rich condition and the O2 sensor voltage will be high.
Right bank O2 sensor rich exhaust indicated The ECM receives a signal from the O2 sensor based on the amount of oxygen in the exhaust. If there is little oxygen in the exhaust, it is in rich condition and the O2 sensor voltage will be high.
A/C Pressure sensor circuit error (low pressure indicated) The ECM monitors the A/C system pressure sensor circuit. If the system pressure is to low the ECM will not allow the A/C compressor to operate.
A/C Pressure sensor circuit error (low pressure indicated) The ECM monitors the A/C system pressure sensor circuit. If the system pressure is to low the ECM will not allow the A/C compressor to operate.
A/C Pressure sensor circuit error The ECM monitors the A/C system pressure sensor circuit. If the system pressure is to low or too high the ECM will not allow the A/C compressor to operate.
A/C Pressure sensor circuit error The ECM monitors the A/C system pressure sensor circuit. If the system pressure is to low or too high the ECM will not allow the A/C compressor to operate.
A/C Clutch Relay circuit error (shorted to ground) The ECM monitors the A/C compressor relay control circuit. If the control circuit is shorted to ground the ECM will set code 68 and the A/C compressor operation will be disabled.
A/C Clutch Relay circuit error (shorted to ground) The ECM monitors the A/C compressor relay control circuit. If the control circuit is shorted to ground the ECM will set code 68 and the A/C compressor operation will be disabled.
Right bank O2 sensor circuit error MAP sensor circuit signal voltage high (low vacuum indicated) Depending on the model, code 63 can refer to two different systems. Please choose from one of the above links for specific information on each system.
Right bank O2 sensor circuit error MAP sensor circuit signal voltage high (low vacuum indicated) Depending on the model, code 63 can refer to two different systems. Please choose from one of the above links for specific information on each system.
A/C Pressure sensor circuit error (high pressure indicated) The ECM monitors the A/C system pressure sensor circuit. If the system pressure is to high the ECM will not allow the A/C compressor to operate.
A/C Pressure sensor circuit error (high pressure indicated) The ECM monitors the A/C system pressure sensor circuit. If the system pressure is to high the ECM will not allow the A/C compressor to operate.
A/C Clutch Relay circuit error (open circuit indicated) A/C High Pressure switch error Depending on the model, code 69 can refer to two different systems. Please choose from one of the above links for specific information on each system.
A/C Clutch Relay circuit error (open circuit indicated) A/C High Pressure switch error Depending on the model, code 69 can refer to two different systems. Please choose from one of the above links for specific information on each system.
Fuel mileage standards raised for cars and light trucks! The Department of Transportation (DOT) and the Environmental Protection Agency (EPA) have teamed up to announce new Corporate Average Fuel Economy (CAFE) standards which are designed to raise the fuel economy for cars and light trucks to 35.5 miles per gallon by 2016.
Fuel mileage standards raised for cars and light trucks! The Department of Transportation (DOT) and the Environmental Protection Agency (EPA) have teamed up to announce new Corporate Average Fuel Economy (CAFE) standards which are designed to raise the fuel economy for cars and light trucks to 35.5 miles per gallon by 2016.
A/C Evaporator Temperature sensor circuit error (low temp indicated) The ECM monitors the A/C Evaporator Temperature sensor circuit. If the evaporator temperature is to low the ECM will not allow the A/C compressor to operate.
A/C Evaporator Temperature sensor circuit error (low temp indicated) The ECM monitors the A/C Evaporator Temperature sensor circuit. If the evaporator temperature is to low the ECM will not allow the A/C compressor to operate.