My 2010 Avenger SXT went into limp mode and threw the ETC light. So I automatically removed my throttle sensor and cleaned it. After doing that and starting the car up, nothing changed. I drove home at 15MPH as my car was in limp mode. Scanned it and got the codes, “P2302 ignition coil A (S.C), P2305 ignition coil B (S.C), & P2308 Ignition coil C SECONDARY CIRCUIT(S.C) ”. A mechanic friend of mine suggested just change the ignition coil at C which would be #3 when counting from left to right. Then voila! Problem solved. Just thought I’d put this out there for anyone in need.