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Check Engine Light

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P0788 OBD-II Trouble Code: Shift/Timing Solenoid High
P0788 means that the ECM has detected a high voltage from the timing solenoid valve (TCM) terminal due to low or dirty fluid, or shorted solenoid.
P0859 OBD-II Trouble Code: Traction Control Input Signal High
PO859 means that the PCM has reported a malfunction relating to the traction control input signal circuit due to a faulty control switch or sensor.
P0663 OBD-II Trouble Code: Intake Manifold Tuning Valve Control Circuit/Open Bank 2
P0663 means that a fault has been detected by the PCM in the intake manifold tuning valve control circuit due to a faulty driver in the PCM.
P0779 OBD-II Trouble Code: Pressure Control Solenoid B Intermittent
P0779 means that the Pressure Control Solenoid B, is receiving intermittent voltage signals due to low or dirty fluid, faulty solenoid, or module.
P0784 OBD-II Trouble Code: 4-5 Shift Malfunction
P0784 means that a malfunction in the 4-5 shift function was detected due to a faulty PCM, TCM or solenoid, low or dirty fluid.
P0791 OBD-II Trouble Code: Intermediate Shaft Speed Sensor “A” Circuit
P0791 means that there is an issue with the intermediate shaft speed sensor circuit due to a faulty sensor, solenoid, or wiring issues.
What Does the Check Engine Warning Light Mean?
The check engine warning light means there is a problem with the vehicle's engine. This could be due to faulty spark plugs or defective sensors.
P0795 OBD-II Trouble Code: Pressure Control Solenoid C
P0795 means that a fault with the electronic pressure control solenoid, or the solenoid circuit, has occurred due to a faulty solenoid, or low fluid.
What Does the Service Required Warning Light Mean?
The service required warning light reminds you when it's time to perform some maintenance for your car, usually an oil and filter change.
P0799 OBD-II Trouble Code: Pressure Control Solenoid “C” Intermittent
P0799 means that there is an issue with one of the pressure control solenoids due to faulty wiring, low or dirty fluid, or defective solenoid.
P0873 OBD-II Trouble Code: Transmission Fluid Pressure Sensor/Switch C Circuit High
P0873 means the transmission fluid pressure level is abnormal due to Dirty, contaminated or burnt transmission fluid, or a faulty transmission system.
P0786 OBD-II Trouble Code: Shift/Timing Solenoid Range/Performance
P0786 means there is a problem with the shift/timing solenoid due to a low fluid levels, faulty solenoid, or internal transmission components.
P0669 OBD-II Trouble Code: PCM/ECM/TCM Internal Temperature Sensor Circuit High
P0669 means that the TCM has detected a malfunction in the internal temperature sensor circuit due to a faulty control module or shorted wiring.
P0814 OBD-II Trouble Code: Transmission Range Display Circuit
P0814 means that there is a problem with the transmission range display circuit due to a misadjusted sensor or faulty wiring.
P0797 OBD-II Trouble Code: Pressure Control Solenoid C Stuck On
P0797 means that there is a problem in one of the electronic pressure control solenoids or circuits due to a faulty solenoid, or low or dirty fluid.
P0816 OBD-II Trouble Code: Downshift Switch Circuit
P0816 means that the downshift switch circuit may have a malfunction due to faulty wiring, transmission gear, or shorted switch harness.
B1472 OBD-II Trouble Code: Lamp Headlamp Input Circuit Short to Ground
B1472 means that the smart junction box detects that the headlamp switch has been turned to the on position, often due to failed wiring or switches.

Related questions

When I accelerate quickly the Check Engine Light comes on.
This may be related to many different things, such as a failing throttle position sensor or a bad mass air flow sensor. The throttle position sensor relays the position of the throttle plate relative to your foot's position on the...
How many crankshaft position sensors are on a 2011 GMC Terrain?
Usually there will only be one crankshaft position sensor. However, there is also a camshaft position sensor as well. It is more likely that there is multiple cam sensors than crank sensors. It is possible for engines to have anywhere...
Multiple sensor error codes
Hi and thanks for contacting YourMechanic. For a all of the problems to occur all at once and make the cruise control and A/C quit, too, this is likely going to be a wiring issue. First check the condition...
Car reads "Pressure Control Valve 3V". I believe it has to do with a solenoid.
Hello. I would need to know some more information about what you car is doing to be able to help with a diagnosis. If it is giving a pressure control code then most of the time this is caused by...
P1292 and P0181 come on when I hit a bump
If these two codes keep coming up together, it sounds like there is probably a spot in the wiring harness that is shorting to ground. P1292 is for an injector and the P0181 is for a fuel temperature sensor, so...
Check Engine Light came on. Car also has problems cranking but only when I refill it with gas.
Hi there - the first thing to do is extract the problem code(s) which are setting the "Check Engine" light. This will more efficiently direct resolution of the problem. Evaporative emission system problems are often associated with "fill-up" issues like...
Limp mode - Honda N WGN
It is possible that the issue could be related to your throttle relay. The throttle relay would be located in your power distribution box under the hood. I would recommend swapping it with a similar relay to determine if the...
Check Engine Light code P2544
The short answer is yes, the tire size can cause the P2544 code. This code sets when the computer sees that the vehicle speed and the requested torque tables in the transmission control module don't coincide. So, a different tire...
Transmission doesn't shift, gets stuck in fail safe mode.
Depending on the circumstances, it may in fact be in "fail-safe" mode. When this happens you will normally also have a Check Engine Light on which will usually cause fault codes to be registered in the ECU. When the vehicle...
Oil pressure switch was replaced but the Check Engine Light is still on.
Hello there, a few different things will cause your 2011 Honda Pilot to still have the Check Engine Light on after the oil pressure switch was replaced. The most common cause would be the code not being cleared after the...
Check Engine light on. Would the computer give all error codes in one shot? How do we know the engine's condition?
Hi there. From the description you have provided, I'm am inclined to agree with your assessment of a used engine being installed in your vehicle. An inspection of the engine, by a qualified technician could determine whether the engine is...
How do you get Check Engine Light reading with no OBD-II plug?
All vehicles that are newer than 1996 and sold in the United States are required to have an OBD-2 system. The scanner plug may have been removed for some reason by the previous owner or mechanic. If this is the...
Engine is misfiring and Check Engine Light is on - 2002 Toyota Tacoma
Hello. A flashing Check Engine Light is a sign that the computer has detected an issue that could potentially damage the vehicle's emissions components. I would recommend scanning the trouble codes when the light is flashing in order to determine...
Fuel filter loses its prime and the Check Engine Light is on - code P0907
It sounds like you may have an issue with your fuel pressure regulator. If the fuel pressure regulator is malfunctioning, this can cause a loss of fuel pressure. If fuel pressure is lost or drops below the manufacturer's specifications, the...
Codes say evap leak, can a car accident cause it?
Hey there. Depending on the impact of the hit to your van, this may have caused some damage to the EVAP system. If you have an air leak on the EVAP system, then the MAP sensor will not be able...
My car won't start but does make noise
Hello there, many common faults will cause your 2008 Toyota Yaris to crank but not start. The most likely is the battery, fuel pump, battery terminals, starter, battery cables, ignition switch, or a wiring harness fault. A qualified Technician such...
My Check Engine Light is on and my truck does not idle when cold. Do I need a new crankshaft position sensor or is this an ECM or timing chain issue?
Hi there. Your vehicle has an idle air control valve that adjusts the idle via commands by the ECU. What it sounds like you adjusted was the throttle plate position when it was closed and had no adjustment on the...
Check Engine Light is on - codes P0313, P0299, P0304
Hi there. Based on what you've described, this could be a combination of faults between 2 or more things; however, I don't believe the coils and spark plugs are at fault. One of the codes is set during a low...
Engine light flashing intermittently
This may be related to a faulty or dirty mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into...
Good morning. My o2 sensor is out. I can't remember which one but when I schedule for someone to fix it, will they have the correc
Hi there. Did the gentleman at auto zone check for proper voltage going to the sensor? Proper return? Was a pin check performed at the engine computer to make sure that the computer was sending the signal? I would be...

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