On the hugely popular 1.5 dCi engine (found in the Renault Megane III, Clio IV, Captur, and Nissan Qashqai), code 1654 relates to the EGR valve. The EGR valve recirculates exhaust gases back into the intake to reduce NOx emissions. The ECU runs regular "learning" cycles to calibrate the EGR valve position. If the valve sticks or the potentiometer reads out of range, code 1654 appears.
Symptoms on diesel:
Perform a smoke test or pressurize the intake system to 0.5 bar. Listen for hissing from intercooler hoses, cracked plastic pipes, or the EGR gasket. mot 1654 renault
If you own any of the following, you are most likely to encounter this gremlin: On the hugely popular 1
Renault issues "Technical Notes" (Notes Techniques) to garages to guide them on complex repairs. There is a known technical note (often referenced as NT 1654 or similar in older archives) regarding the repair of the rear suspension beam. If you own any of the following, you
Code 1654 rarely appears silently. Before your MOT, you might have noticed: