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P2187 Diagnostic Trouble Code Discussion for December 2006

Fuel System Too Lean At Idle

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Trouble Ticket Help Requests for DTC P2187
Help Request Posted
2004 Mazda 3 i 2.0L MIL Lamp on, CODE P2187 VIN: JM1BK12F44
P2187: Fuel System Too Lean At Idle. ... came in a couple weeks ago with a code p2187 for system lean at idle. watching datastream, noticed that the HO2S1 was contantly toggling the heater on and off, almost like a duty cycle. the HO22 isn't doing this. Consulted with the shop owner, he wanted to...
December 19, 2006