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2003 ford focus problems

I have code 300, 301, 302 303, 304, I checked egr and its good, replaced camshaft sensor and still cant find problem

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  • 133 Answers

Have you try'd dropping the batt negative for 10 mins and reconecting then clearing the generic codes //

Posted on Dec 30, 2013

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Posted on Jan 02, 2017

davesmith_37
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SOURCE: P0340 Code Camshaft Position Sensor


The Camshaft Position (CMP) Sensor detects the position of the camshaft in order to identifiy when piston No. 1 is on its compression stroke. The CMP sensor is used for ignition timing in the Ford DIS igntion system, but not in the EDIS igntion system. Both DIS/EDIS use the CMP signal for synchronizing the firing of sequential fuel injectors.

On the 3.0L vulcan engine, the CMP signal is generated by a single Hall-Effect magnetic switch, activated by a single "vane" spinning around by virture of a synchronized shaft which is driven by the camshaft. 

The CMP sensor & synchronizer/shaft are located behind the intake manifold (i.e., back near the firewall on a Ranger) on the top of the cylinder block. If you just need to replace the sensor, it is a simple job of unplugging the electrical connector and removing the screws holding the sensor in place. Here is a sketch of the sensor to give you an idea what to look for:

Posted on Feb 27, 2009

  • 202 Answers

SOURCE: 1997 ford explorer check engine lite is on.Code

you probably have blocked passages in the intake manifold. remove the egr and check the port for a clog. you can scrape most of the carbon out with a pick or screw driver and then use some spray carbon cleaner in there. also check the metal exhaust line to the egr

Posted on Nov 17, 2009

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SOURCE: 2003 ford escape.......code p0446 Evaporative

Most likely evap vent solenoid needs to be replaced. Locate replacement solenoid at auto parts store or dealer & replace.

Posted on Apr 04, 2011

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2003 ford expedition check engine light is on. It is reading a p405 code which is the egr sensor. I have change the sensor and the pig or electrical code twice . I brought the sensor from ford.


This DTC says nothing about changing the sensor or the connector or pig tail ! It's a circuit voltage low code
P0405 - DPF EGR Sensor Circuit Low Voltage Detected See DTC P1400 Problem with wiring or PCM !
P1400 - DPF EGR Sensor Circuit Low Voltage Detected The EGR monitor checks the DPF EGR sensor signal to the PCM for low voltage. The test fails when the average voltage to the PCM drops to a voltage less than the minimum calibrated value.
  • DPFEGR circuit short to GND
  • Damaged DPF EGR sensor
  • VREF short to GND
  • Damaged PCM
A DPF EGR PID reading less than 0.2 volt with the key ON and engine OFF or running, indicates a hard fault.

Sep 01, 2016 | 2003 Ford Expedition

1 Answer

I cant get rid of p1401 code on 2001 focus already replaced dpfe sensor


Are the hoses to the dpfe clear & not a problem?

Is the egr valve working?

May need to look at scan tool data, for not only
the codes, but voltages from the sensor

Check wire connector pins?

Oct 20, 2014 | 2001 Ford Focus

2 Answers

Where is 2003 ford focus camshafts position sensor


Camshaft Position Sensor
The camshaft position (CMP) sensor detects the position of the camshaft. The CMP sensor identifies when piston No. 1 is on its compression stroke. A signal is then sent to the powertrain control module (PCM) and used for synchronizing the firing of sequential fuel injectors. The Coil On Plug (COP) Ignition applications also use the CMP signal to select the proper ignition coil to fire. The input circuit to the PCM is referred to as the CMP input or circuit.
There are two types of CMP sensors: the three pin connector Hall-effect type sensor (Figure 25) and the two pin connector variable reluctance sensor

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and next the location of 2003 ford focus camshafts position sensor
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Sep 13, 2014 | 2003 Ford Focus

1 Answer

2003 windstar stalls when driving, idles high in neutral, now 4 codes


ok so much done owell next is the mass air flow to be checked then the fuel regulator to check pressure and the fuel pump for pressure and then check the cat,s for back pressure wood be my next thing and Last is the how many Km,s does it Have ?sounds like filter needs lookin at in the tranny if she,s got High Km,s if not then check the intake for leaks it,s Plastic so don,t hurt gone this far Let me Know What Happens,s Thank,s

Apr 08, 2013 | 2003 Ford Windstar

1 Answer

P0340 on a ford focus 2003?


This is a Code for the Camshaft sensor circuit. It can be the camshaft sensor, the wiring loom, or the PCM it reports to.

A lot depends on if the car runs at all. The wiring loom and the camshaft sensor can be checked for continuity with an Ohmmeter. The PCM is an expensive part and is delicate. Testing is more involved.

Hopefully the first few things you look at will reveal the defect.

Feb 23, 2013 | 2003 Ford Focus

1 Answer

I have 2000 ford focus im working on and I had code po340. so I replaced the cam and crank sensor. It still pops threw the air intake and dies when put in gear. Timming belt is newer and still in time


A code P0340 could mean one or more of the following has happened:
  • a wire or connector in the circuit could be grounded/shorted/broken
  • the camshaft position sensor may have failed
  • the PCM may have failed
  • there exists an open circuit
  • the crankshaft position sensor may have failed

With a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
  • Visually inspect all the wiring and connectors in the circuit
  • Check for continuity in the circuit wiring
  • Check the operation (voltage) of the camshaft position sensor
  • Replace the camshaft position sensor as required
  • Check the crankshaft position circuit as well
  • Replace circuit wiring and/or connectors as required
  • Diagnose/replace the PCM as required

Sep 05, 2011 | 2000 Ford Focus

2 Answers

Idles really rough and today it died while I was stopped at a stop light . Had the codes checked about a week ago and was told my egr valve was bad and needed to be replaced .. I replaced it and it lasted...


There are several codes that can be set by the EGR system. EGR valve failures on Fords are very rare. There is usually something wrong with the EGR Control Solenoid, The EGR ports clogged up, The DPFE sensor (the sensor that monitors the EGR system) or the vacuum lines between the intake manifold and the control solenoid or between the solenoid and the valve.

Fault codes NEVER tell you what parts to replace. They only tell you which engine management system is failing to function properly. Anytime there is a fault code the system has to be diagnosed to find out what is causing it to not operate like it should. You can spend a lot of money on parts and not fix your EGR system if proper diagnosis is not performed.

If the gasket for the EGR valve is leaking it will cause your engine to idle very high and will cause the computer to set "lean O2 sensor" codes. If this is not occuring, it is safe to assume that the EGR gasket is not a problem.

There are many things that can cause your engine to die at a stop light. Everything from a loose battery terminal to a failed computer module to a bad ignition switch, to a malfunctioning Idle Air Control (IAC) valve or an intermittent problem with a Crankshaft Position Sensor. I would recommend having it checked out by a professional if it continues to be a problem.

Dec 19, 2010 | 2003 Ford Focus

1 Answer

Starts sometimes wont idle or accelerate


try checking your egr valve pressure sensor i have a 96 eddie bauer explorer and had the same problem and only showed me a code for a oxygen sensor malfuntion and replaced both and it cured it

Jun 23, 2010 | 1996 Ford Explorer

1 Answer

Rough idle and engine will shut off after warm.


Check the exhaust manifold gasket. I have a 2003 SVT Focus I had a problem with it loping at low RPMs. I had a free flow exhaust system. When I bought a new exhaust manifold I replaced the gasket and the problem went away.

Apr 07, 2009 | 2001 Ford Focus

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