Q: P0174, P1004 codes

asked by on August 28, 2016

Started out with a very strong exhaust smell that lingured inside even with the windows rolled up even on the highway well then the car start losing acceleration and the CEL came on and now the car idles rough and still has acceleration problems at low speeds but seems to do better at high speeds Im getting codes p0174 and p1004

My car has 10000 miles.
My car has an automatic transmission.

Hello.

From what you describe it would appear that your vehicle is experiencing some sort of fuel or engine performance issues. Code P0174 is for an lean condition in engine bank 2. This can be caused by many things, however a few common causes are a bad fuel pump, a fuel injector issue. Code P1004 is for an issue with the short runner control valve assembly. This is a component installed in the intake manifold that controls the opening and closing of butterfly valves in the intake runners that are meant to increase low RPM performance. This code is set off when the computer detects an issue with the signal, perhaps due to a faulty unit. The two codes address different issues, but it may be possible that the two are related. As engine performance issues can sometimes be difficult to diagnose, I would recommend having a certified technician, like one from YourMechanic, perform a professional diagnosis of your trouble codes if you are unsure of the issue.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

What causes shaking in 2nd gear when I accelerate

Hi There, It sounds like something may be loose when the reinstallation happened resulting in the vibration as the torque of the engine is transferred to the suspension when shifting to second gear. I would suggest having a professional from...

Car turn over but stalls out

Hi. If the engine will turn over and try to start, then it may be a problem with fuel pressure or one of the engine sensors. It is common for the fuel pump to fail as well as the crank...

My headlights do not turn off

Your vehicle is probably equipped with daytime running lights, whereas the other car you saw was not. On your vehicle, these lights will stay illuminated regardless of whether the exterior light switch is in the on or off position. There...

Related articles

P2402 OBD-II Trouble Code: EVAP Leak Detection Pump Control Circuit High
What the P2402 code means? P2402 is an OBD-II generic code for the engine control module (ECM) detecting the evaporative system leak...
P0289 OBD-II Trouble Code: Cylinder 10 Injector Circuit High
P0289 P0289 code definition The DTC P0289 code indicates that the number 10 cylinder is experiencing an above average amount of current at the fuel injector. What the P0289 code means Code P0289 means that the fuel injector circuit...
P2140 OBD-II Trouble Code: Throttle/Pedal Position Sensor/Switch E / F Voltage Correlation
P2140 P2140 code definition Throttle/Pedal Position Sensor/Switch E / F Voltage Correlation Related Trouble Codes: P2135: Throttle/Pedal Position Sensor/Switch A / B Voltage Correlation P2136: Throttle/Pedal Position Sensor/Switch A / C Voltage Correlation P2137: Throttle/Pedal Position Sensor/Switch B /...