Cadillac XLR Flashing Check Engine Light: Diagnosis

The check engine light indicates that you need to service a vehicle soon. If your Cadillac XLR has a flashing check engine light means that there is a catalyst damaging misfire (it can damage the catalytic converter and O2 sensors). If your car has a flashing check engine light, it means you need to service … Read more

Cadillac XLR Troubleshooting:  Squeaky Brakes

  Your Cadillac XLR‘s braking system is designed to handle thousands of miles of braking with no intervention from you.  When its brakes begin to squeak, they are telling you that they need some attention. The most typical cause of squeaky brakes are the brake pads themselves, but there are other issues that can cause … Read more

Cadillac XLR:  Heater Not Working Diagnosis

  One of the most common (and inconvenient) problems with the Cadillac XLR is when it has no heat coming from the heater. Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. At the simplest level, there are two main reasons why the heater is not … Read more

Cadillac XLR P0405:  EGR Sensor “A” → Circuit Low

P0405 is a generic OBDII trouble code.  It deals with the signal coming from the EGR system.  Since it is a generic code, it has the same meaning for the Cadillac XLR as it would any other vehicle.   The EGR system allows a certain amount of the XLR’s exhaust to re-enter the combustion chamber, which … Read more

Cadillac XLR P0421 Code: Meaning, Causes, How to Fix

P0421 is a relatively rare OBDII trouble code.   It’s generic, which means it has the same definition for the Cadillac XLR as it would any other vehicle. It is technically defined as “Warm Up Catalyst Efficiency → Below Threshold (Bank 1)”. In layman’s terms, it indicates that your Cadillac XLR’s catalytic converter is not scrubbing pollutants efficiently … Read more

Cadillac XLR P0316: Engine Misfire → At Startup

A relatively common, yet difficult to diagnose OBD-II trouble code is P0316. It has the same meaning for the Cadillac XLR as it would any other vehicle.  It indicates that there is a misfire at the startup of the vehicle, and that it happens within the first 1000 revolutions of the engine. P0316: Engine Misfire … Read more

Cadillac XLR P0740: Torque Converter Clutch Circuit Malfunction

P0740 is one of the most common transmission trouble codes. It means that the XLR‘s computer has detected that there is an issue with the torque converter clutch (TCC) solenoid circuit.     P0740: Torque Converter Clutch Circuit Malfunction   The TCC “locks” the drivetrain, which allows for a true mechanical connection between the transmission … Read more