Skip the auto shop - Our mechanics make house calls

Q: code p0591 has check engine light on, but car has no crusie control, what else is it on for?

asked by on

code p0591 on my car ,but car does not have crusie control, why is this code on?

My car has 65000 miles.
My car has a manual transmission.

A: According to my records, the code you are r...

According to my records, the code you are receiving is for a powertrain issue relating to cylinder 4 being out of balance. On diesel engines this can indicate a glow plug issue. This can be related to the fuel composition sensor circuit. You may want to look into the sensor, or the fuel system. You should also look into cylinder 4 and make sure the ignition system is working well. This means inspecting the spark plug and wire. Are there any other issues going on with your car at this point in time? If you are having the vehicle scanned with a generic reader, the codes may not come up as accurately as they can with an upgraded version. Manufacturer specific or equivalent scan tools may want to be run on the vehicle for a better analysis.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Which sensors are most important for monitoring and improving the engine’s performance?

The way modern electronic engine control systems are designed, all of the sensors are important but some are more crucial to the vehicle than others. For example, if the engine electronic control unit (ECU) loses the input from the coolant...

Q: How do I cancel and resume cruise control?

You may want to cancel cruise control when you are in heavy traffic and then resume it again once you are back in an open area. You don’t have to completely re-set the cruise control if you use the cancel...

Q: Car shakes and hesitates upon acceleration.

A weak battery will cause all of the electronics to fail. If this was the case, you would have hard steering and radio malfunctions as well. There are quite a few components that could cause poor acceleration. You will want...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...