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  1. Problem Reports
    Ok, so this set of codes has finally drove me mad!!! For starters: 2003 Eclipse GS, 2.4L 4-Cylinder with stock engine, no upgrades. I bought the car back in April 2013. After about a month of driving it, the check engine light came on. Bam. P0420. Catalyst Efficiency Below Threshold. The...
  2. Problem Reports
    Hello all, I have an '03 GTS Eclipse. 184,000 miles. Automatic. A week ago my engine light popped on with P0171 and P0174. So i replaced some vacuum lines and tightened the intake and the codes stayed away for about 800 miles (I took the car on a trip to New Orleans). The light popped back on...
  3. Problem Reports
    I've had the code for about a year now. Car has 160k miles on and here recently I've done some research about it. It could be the Catalytic converter, O2 sensor, or a fouled sparkplug. The car doesn't have a miss, an when I turn the CEL off the code comes back up after about 15 minutes. I've...
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