I have a 2006 caddy with 168000 miles and keep getting intermittent ignition hesitation, usually…

mfburns271

I have a 2006 caddy with 168000 miles and keep getting intermittent ignition hesitation, usually noticed at idle and in gear. Codes call to replace coil ,Done, replace plugs, done, replace O2 sensor, done, still get the problem on and off. The codes show missing usually on the #8 cylinder. Any advice. Some days worse then others. Could this be vacuum hose leakage and if so how do I test that.

Comments (4)
No. 1-4
mfburns271
mfburns271

4.6 L engine

mfburns271
mfburns271

DTS confirmed code P2A03 O2 Sensor Circuit Range Performance Bank 2 Sensor 1 , Pending trouble codes P3000 Random multiple cylinder misfires, P2A03 SensorCircuit Range Performance Bank 2 Sensor 1.

mfburns271
mfburns271

DTS

Believe231
Believe231

Post the codes you're getting now. Which model and engine?