P0304 Jeep and P2311 Jeep both codes on

Question

2006 Jeep Liberty 80,000 mi. New plug, new coil did compression test on #4, 150#'s. After all that, that was when P2311 code came on, ingnition coil D secondary circuit came on also. Still has P0304

Answer 1

Hi there,

Here is a list of possible causes for the P2311 code.

P2311 JEEP - Ignition Coil 'D' Secondary Circuit

Read more: https://www.autocodes.com/p2311_jeep.html

P0304 indicates a misfire on cylinder 4. Here is a list of possible causes.

P0304 JEEP - Cylinder Misfire Fault Detected

Read more: https://www.autocodes.com/p0304_jeep.html