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I have a 2004 bmw x5 with a 3.0 engine. the engine light is…

I have a 2004 bmw...
I have a 2004 bmw x5 with a 3.0 engine. the engine light is on and the codes are P1620 AND P0306. what are these referring to?
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Answered in 3 minutes by:
3/9/2018
Kevin
Kevin, BMW Mechanic
Category: BMW
Satisfied Customers: 3,097
Experience: Diagnostic technician
Verified

Hi im kevin the p0306 is missfire on cylinder 6 .this is in most cases a failing ignition coil and replacement cures the issue in most cases.the p1620 is refering to an issue with the electronic thermostat .replacing the thermostat again will cure in most cases

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P1620 map controlled thermostat control circuit signal high

Possible causes- Faulty Thermostat ,Faulty Thermostat Housing Sensor Thermostat Housing Sensor harness is open or shorted, Thermostat Housing Sensor circuit poor electrical connection

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P0306 missfire cylinder 6

Possible causes -Faulty spark plug 6 Clogged or faulty fuel injector 6 ,Faulty ignition coil 6 ,Fuel injector 6 harness is open or shorted ,Fuel injector 6 circuit poor electrical connection ,Ignition coil 6 harness is open or shorted ,Ignition coil 6 circuit poor electrical connection ,Insufficient cylinder 6 compression, Incorrect fuel pressure, Intake air leak

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please remember to rate my service and let me know if you need anything else at all

Kevin
Kevin, BMW Mechanic
Category: BMW
Satisfied Customers: 3,097
Experience: Diagnostic technician
Verified
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