What is the troubleshooting method for fault code p2188?

1 Answers
VictoriaLynn
07/24/25 8:44pm
Fault code p2188 indicates that the air-fuel mixture is too rich at engine idle, manifested by the engine light illuminating, stalling when starting, and sluggish throttle response when the engine is cold. The troubleshooting method for fault code p2188 is: Check the throttle opening or whether the throttle is dirty or clogged, and clean or replace it in time. Possible causes for an overly rich mixture include: 1. Poor performance of the oxygen sensor, coolant temperature sensor, intake air temperature sensor, throttle position sensor, air flow meter, or intake manifold pressure sensor; 2. Severe clogging of the air filter or fuel injector dripping; 3. Poor performance of the fuel pressure regulator.
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