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2002 VW Jetta 1.8 Turbo P0118 Code: Fix After Replacing ECT Sensor and Ignition Coils

Model: 2002 vw jetta 1.8 turbo Fault Code: P0118 Posted: 2014-09-25 11:45

Hi everyone, I'm having trouble with my 2002 VW Jetta 1.8 Turbo that's showing a persistent P0118 engine code along with occasional misfires. I've already replaced the ignition coils (which were faulty) and spark plugs to address the misfiring issue. After researching, I suspected the Engine Coolant Temperature (ECT) sensor as a potential cause of the P0118 code, so I replaced it as well. The check engine light turned off after the replacement, and I used an OBD2 scanner to clear all codes. However, the P0110 code is still showing up in the system even though the warning light is no longer on. This is preventing me from passing smog inspection. I'm wondering what else could be causing this—could it be a wiring issue or a faulty connector? Additionally, my engine still exhibits a slight idle stutter, which has improved but remains noticeable. Any insights or suggestions would be greatly appreciated! Thanks in advance.

Related fault codes
P0118
Comments (2)
Anonymous 2014-09-25 12:01

Update: After driving for about 25 minutes, the check engine light has reappeared. Does anyone have any advice on what might be causing this? I'm also wondering if radiator flushing could help resolve underlying cooling system issues.

Anonymous 2014-09-25 12:38

P0118 is typically a circuit-related issue—what voltage is the PCM reading from the ECT sensor? Did you inspect the sensor connector and wiring for damage or corrosion after replacement?