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2006 Cadillac CTS Engine Problems

79 TrueDelta members own (or used to own) a 2006 Cadillac CTS. 15 of these members (19%) have reported engine repairs for their car. A total of 30 engine repairs to 2006 Cadillac CTSs--an average of 0.4 per vehicle--have been reported.

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently 2006 Cadillac CTS problems occur, check out our car reliability stats.

Chart based on 80 repairs.

2006 Cadillac CTS engine repair cost distribution

Chart based on 11 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Non-members can see only ten 2006 Cadillac CTS repair histories. Log in or join us to see them all.

2006 Cadillac CTS

Engine not specified

64000 mi US $2300 The intake manifold gasket had to be replaced along with a coil pack and the spark plugs. Car does not run the same now.  

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2006 Cadillac CTS 4dr Sedan

255-horsepower 3.6L V6 6-speed manual RWD

85000 mi US $614 Replaced the water pump. 

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2006 Cadillac CTS 4dr Sedan

255-horsepower 3.6L V6 5-speed shiftable automatic RWD

94000 mi US $400 Car is bucking and feels like its going to kill. There is also a rattling noise under the hood like something is loose 
96000   Coil pack 
110000   Coil pack 
106000 US $65 Developed an engine miss. Pulled code and found that number three cylinder had misfires. Replaced ignition coil. Problem corrected 
89000 US $85 knocking sound coming from the front of engine between 29 to 30mph 
46000   Fuel Injector 5 failed - stuck in the full open position causing extremely rich fuel air mixture. 
102000   ECM module was failing, had a couple of 'no crank no start. No engine lights even though I believe I had a O2 sensor bad.Watched YouTube which described condition. 
500   reflashed ECU to try and fix on-board computer faults. Also affected the radio and ability to get into the custom settings menu for the car. 
14500   Replaced Rear main seal for oil leak 
42000   Rear main seal had a small leak when turned in. About to replace leaking radiator when turned in. 

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2006 Cadillac CTS 4dr Sedan

210-horsepower 2.8L V6 5-speed shiftable automatic RWD

45260 mi   Timing chain. 
51460 C $500 Radiator cap and coolant. 
58900   LIGHT ENGINE 21, CALLED ONSTAR, CODE P 0604 SEPT 21. APPOINTMENT DEALER FOR 27 SEPT. AT DEALER LIGHT WENT OFF. DEALER DECIDE TO DO NOTHING! 
62000   Changed spark plug cylinder 5, and swapped ignition coils between 5 and 6. Still knocking. Fixed misfire. Spark plug and ignition coil for cylinder #5. Replaced radiator cap. 
62400   Oil cooler, radiator, etc. blew up, transmission fluid leaked onto the street. Bill initially $1,500, reduced to $460 after I gave them an earful. Cadillac paid for the parts, I paid labor. 
64140   Misfire cylider #3. Intake gasket removed. 
122000 US $265 Air intake manifold replaced 
27000   Water Pump leaking. Replaced Water hose not tight. They repaired. 

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