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P0804 OBD-II Trouble Code: Upshift (Skip Shift) Lamp Control Circuit Malfunction
What What the P0804 code means Your vehicle’s powertrain control module (PCM) has detected a malfunction in the one through four skip shift solenoid lamp control circuit. The one through four skip shift solenoid control circuit is also known as...
P0304 OBD-II Trouble Code: Cylinder 4 Misfire Detected
P0304 code definition P0304 is a diagnostic trouble code seen when a misfire is detected in cylinder 4. This code may...
P0420 OBD-II Trouble Code: Catalyst System Efficiency Below Threshold (Bank 1)
P0420 code means that either the upstream or downstream oxygen sensor in the catalytic converter is not working. Replacing these parts can fix P0420.
How to Read and Understand Check Engine Light (OBD-II) Codes
The Check Engine Light indicates a trouble code stored in the car’s computer and can indicate a number of issues.
P0171 OBD-II Trouble Code: System Too Lean (Bank 1)
P0171 code definition System Too Lean (Bank 1) What the P0171 code means The P0171 OBD-II code means that, on the first...
P2165 OBD-II Throttle/Pedal Pos Sensor C Maximum Stop Perf
P2165 P2165 code definition The code P2165 means that there is a malfunction with the “C” pedal position sensor circuit. What the P2165 code means The vehicle’s PCM (powertrain control module) monitors the throttle pedal position sensors. If it stores...
P0999 Shift Solenoid F Control Circuit High
P0999 P0999 code definition The P0999 code identifies a problem in an automatic transmission in the shift solenoid F circuitry and sets the code. What the P0999 code means A P0999 code the OBD-II generic code for a problem between...
P2214 NOx Sensor Circ Range/Perf Bank2
P2214 P2214 code definition The P2214 code occurs when the powertrain control module has detected that the nitric oxide and nitrogen dioxide gases (NOx) sensor circuit voltage reading is not in the anticipated levels for the engine bank (in this...
P2046 OBD-II Trouble Code: Reductant Temp Sensor Circ Interm
P2046 P2046 code definition The P2046 code indicates that there has been a malfunction in the reductant injector air temperature sensor circuit. What the P2046 code means The reductant injector is part of the system that reduces the gas...
P0965 OBD-II Trouble Code: Pressure Control Solenoid B Control Circuit Range/Performance
P0965 P0965 code definition The P0965 code is stored by the PCM (powertrain control module) when it detects a voltage level from clutch pressure control solenoid B that is invalid or outside the normal range. What the P0965 code...
P0904 OBD-II Trouble Code: Gate Select Position Circuit [senses left / right position]
P0904 P0904 code definition The P0904 code indicates that the electronic control module, or ECM, has detected a problem with the gate select position censor circuit. This code may also be accompanied by the P0905, P0906, P0907, or P0908 codes....
P0901 OBD-II Trouble Code: Clutch Actuator Circuit Range/Performance
P0901 P0901 code definition When the PCM (powertrain control module) detects that the clutch actuator circuit is not performing within the range determined by the manufacturer, it will record a P0901 code and illuminate the Check Engine light. What the...
P0900 OBD-II Trouble Code: Clutch Actuator Circuit / Open
P0900 P0900 code definition This trouble code is defined as the clutch actuator circuit being open. What the P0900 code means When the PCM (powertrain control module) detects an open circuit in the clutch actuator control circuit, it will log...
P0875 OBD-II Trouble Code: Transmission Fluid Pressure Sensor/Switch D Circuit
P0875 P0875 code definition The P0875 code indicates that the transmission fluid pressure is not correct, according to the manufacturer’s specifications. What the P0875 code means The fluid pressure sensor provides the PCM with the data necessary to monitor the...
P0870 Transmission Fluid Pressure Sensor/Switch C Circuit
P0870 P0870 code definition A P0870 code indicates that the powertrain control module (PCM) has determined that the pressure of the transmission fluid is not within the desired range. What the P0870 code means The P0870 is an OBD-II generic...
P0852 OBD-II Trouble Code: Park / Neutral Switch Input Circuit High
P0852 P0852 code definition The code P0852 indicates that a malfunction was detected within the park/neutral switch input circuit. This code is only found in vehicles with both automatic transmissions and four-wheel-drive capability. What the P0852 code means The PCM...
P0851 OBD-II Trouble Code: Park / Neutral Switch Input Circuit Low
P0851 P0851 code definition The code P0851 indicates that the voltage reading from the park/neutral switch input circuit was too low compared to the manufacturer’s specifications for the current driving conditions. This code is only found in vehicles with both...
P0850 OBD-II Trouble Code: Park / Neutral Switch Input Circuit
P0850 P0850 code definition If the PCM has stored the P0850 code, it means that the input circuit which measures the function of the park/neutral switch has given an abnormal voltage reading. What the P0850 code means If the vehicle...
P0845 OBD-II Trouble Code: Transmission Fluid Pressure Sensor/Switch B Circuit
P0845 P0845 code definition The P0845 code is detected with an abnormal voltage reading from the transmission fluid pressure sensor circuit alerts the PCM. This code is often stored with other torque converter clutch, shift solenoid, transmission slippage, gear ratio,...
P0842 OBD-II Trouble Code: Transmission Fluid Pressure Sensor/Switch A Circuit Low
P0842 P0842 code definition The P0842 code indicates that there has been an abnormally high voltage reading from the transmission fluid pressure sensor circuit. Other shift solenoid, transmission slippage, lock up, gear ratio, or torque converter clutch codes are often...

Related questions

Question
I changed spark plugs and wires & cleaned throttle body, car idles rough and gas mileage is changed does not backfire or anything
A few different components could be causing your issue. Your symptoms sound at first like a spark issue. If a plug was tightened down too hard, the gap can become smaller than intended. This would decrease the power of the...
Question
Wont start
You should have the vehicle scanned for codes to see if you have codes to the camshaft or crankshaft sensors. Either of these may cause the no spark condition. If the fuel pump regulator is bad, then you would...
Question
Why is my car accelerating by itself?
This vehicle engine has a manual throttle cable and cannot accelerate by itself. You may have a faulty idle air control valve that can cause a high idle but is limited to only about 1250 rpm. I would recommend having...
Question
What is causing the engine misfires?
It is usually best to change all the coils when chasing a misfire with engines of this age and mileage. If one is weak, they are likely all weak. When you changed the plugs, was there oil in the spark...
Question
transmission shifting
If you are still getting the P0720 code after replacing the sensor then you should verify the wiring connection first to the sensor and also in between the sensor and ECM. Remove the sensor and turn the drive shaft. From...
Question
Timing chain problem?
It could very well be a timing chain problem. The P0016 and 17 indicate that the camshaft sensors are sensing the camshaft in a position that does not logically correspond with the crankshaft. The P0302 and P0355 codes are misfire...
Question
Throttle Position Sensor
The throttle position sensor is a very common part on most cars, however it is specific to your vehicle's engine application. This is something that ca be purchased at most local auto parts stores (i.e. Autozone, Oreily's, etc.) relatively inexpensively....
Question
Throttle Position Sensor
Anytime you go to a parts store to get a computer scan for the Check Engine Light you are not getting a diagnosis of the problem but only a code retrieved from the engine control module (ECM) memory. This is...
Question
Starting problem
At 180.000 miles, it could be just about anything. The P0161 and P0140 codes are oxygen sensor codes, and probably don't have anything to do with the starting issue, though you should have that investigated. The P0300 code however is...
Question
Stalling
Hi there: The EVAP system is comprised of multiple components. Although the gas cap removal is the easiest job to complete and the source of many of these problems, another common issue is caused by the EVAP vent solenoid. When...
Question
Reduced engine power
Code P0120 relates to the throttle position sensor and can be caused by the following: Sticking throttle return spring MAP or TPS connector corrosion Misrouted harness causing chafing Bad TPS Bad PCM Code P0220 relates to the...
Question
Powertrain warning lamp
In this case you will need to have the computer scanned to retrieve the codes that are stored. The codes will indicate the exact problem areas. Have the trouble codes and warning light diagnosed by a certified technician, such as...
Question
Pcm
Hello, thanks for writing in about your Ford F-150. I'm curious if you got the new PCM from the dealer. You should check if have the exact same part number on it. If the part numbers do not match and...
Question
p0420
A vehicle with 182,000 miles is likely due for a catalytic converter. Most of the time it does mean you need a new catalytic converter. But there are a couple of other things that are prudent to take a look...
Question
No start
Hello. A no start condition can be caused by a wide variety of issues, and from what you describe it would appear that the vehicle may have more than one issue. If spraying brake cleaner into the intake helped...
Question
My truck turns over but won't start.
When a truck won't start, it's usually going to be an ignition or fuel system-related malfunction. The fact that your gas gauge was "ticking" a bit may be an indicator that an electrical problem exists, causing the ignition system to...
Question
My car will not start
This could be a variety of things ranging from a fuel delivery problem to a no spark problem. The good thing is you know you are getting power to the starter if it cranks. Outside of this you will need...
Question
My car is shaking.
Hello. the Diagnostic Trouble Codes would have to be retrieved to begin the diagnosis. Unless the shop retrieved all codes and performed a diagnosis and tested the coils (there are six of them on your engine), what they have told...
Question
My '98 expedition, it drives fine for a while, then after a few hours, when sitting still, it idles rough then shuts off.
After some testing done to verify the EGR valve flow to see if the valve is intermittently sticking open causing the stall. This can be done using a scanner with the capability to open and close the EGR valve and...
Question
MAF sensor
jeff engstrom

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