W211 AMG Discuss the W211 AMG's such as the E55 and the E63
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P0203 CEL

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Old 01-23-2013, 12:30 PM
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2019 GLE 63 S Coupe 2020 E 63 S
P0203 CEL

Just popped this code.

I'm running 175 pulley, 550 TTM injectors, looped rail, MBH headers.

This setup for about 10,000 miles. Car runs great no rough running or idling or misfires.

I'm going to sway the injector with another to see of the codes changes or not.

Anyone else have this problem?

I'm guessing either the wiring or a dirty injector or bad injector. But I have experienced no issues with the way the car runs.
Old 01-23-2013, 04:44 PM
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2019 GLE 63 S Coupe 2020 E 63 S
Talked to Bruce at TTM this morning. He said I should check all the connections. I pulled about each injector wiring connection and ohmed out each injector each one was correct. I cleaned the connectors and reassembled and the CEL went off immediately when I restarted the car.

Thanks Bruce!

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