2004 Chrysler Sebring P0301 code

But still no luck?

TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CODE TO BE SET ARE:) à   Ignition system related part (s) failed. à   Low compression pressure. à   Injector failed. à   ECM failed. < M/T > à   PCM failed. < A/T > à   No. 1 cylinder spark plugs failed. à   Harness damage in No. 1 cylinder injector circuit, or connector damage.DIAGNOSIS Required Special Tool: à   MB991502: Scan Tool (MUT-II). STEP 1. Check the No.1 cylinder spark plug. 1. Remove the intake manifold. 2. Check the plug gap and replace if the limit is exceeded. Standard value: 1.0 - 1.1 mm (0.039 - 0.043 inch) Limit: 1.3 mm (0.051 inch) Q: Is the plug gap at the standard value? YES: Go to Step 2. NO: Replace the No.1 cylinder spark plug. Then go to Step 9 . Fig. 1017: Identifying Spark Plug Gap Courtesy of DAIMLERCHRYSLER CORP. STEP 2. Check the No.1 cylinder spark plug cable. 1. Check the cap and coating for cracks. 2. Measure the resistance. Limit: maximum 22 kohm Q: Is the measured resistance less than 22 kohm? YES: Go to Step 3. NO: Replace the No.1 cylinder spark plug cable. Then go to Step 9 . Fig. 1018: Measuring Spark Plug Cable Resistance Courtesy of DAIMLERCHRYSLER CORP. STEP 3. Check the No.1 cylinder injector. 1. Disconnect the No.1 cylinder injector connector B-01. NOTE: For Special Tool identification, see SPECIAL TOOLS . CAUTION: Do not attempt to adjust the gap of the platinum plug. Cleaning of the platinum plug may result in damage to the platinum tips. Therefore, if carbon deposits must be removed, use a plug cleaner and complete cleaning within 20 seconds to protect the electrode. Do not use a wire brush.Fig. 1019: Locating Connector B-01 Courtesy of DAIMLERCHRYSLER CORP. 2. Measure the resistance between injector side connector terminals No. 1 and No. 2. Standard value: 13 - 16 ohms [at 20 °C (68 °F)] Q: Is the resistance between 13 and 16 ohms? YES: Go to Step 4. NO: Replace the No.1 cylinder injector. Then go to Step 9 . Fig. 1020: Measuring Resistance Between Connector Terminals No. 1 And No. 2 Courtesy of DAIMLERCHRYSLER CORP. STEP 4. Check connector B-01 at No.1 cylinder injector and connector B-118 at injector intermediate connector for damage. Q: Is the connector in good condition? YES: Go to Step 5. NO: Repair or replace it. Refer to HARNESS CONNECTOR INSPECTION . Then go to Step 9 . Fig. 1021: Locating Connector B-01 Courtesy of DAIMLERCHRYSLER CORP. Fig. 1022: Identifying Connector B-118 Courtesy of DAIMLERCHRYSLER CORP. STEP 5. Check connector C-111 at ECM < M/T > or connector C-112 at PCM < A/T > for damage. Q: Is the connector in good condition? YES: Go to Step 6. NO: Repair or replace it. Refer to HARNESS CONNECTOR INSPECTION . Then go to Step 9 . Fig. 1023: Identifying Connector C-111 Courtesy of DAIMLERCHRYSLER CORP. Fig. 1024: Locating Connector C-112 Courtesy of DAIMLERCHRYSLER CORP. STEP 6. Check for harness damage between No. 1 cylinder injector connector B-01 (terminal No.2) and ECM connector C-111 (terminal No.1) < M/T > or PCM connector C- 112 (terminal No.1) < A/T >.Q: Is the harness wire in good condition? YES: Go to Step 7. NO: Repair it. Then go to Step 9 .STEP 7. Check the compression. Refer to COMPRESSION PRESSURE CHECK . Q: Are there any abnormalities? YES: Go to Step 8. NO: Repair or replace it. Then go to Step 9 . STEP 8. Replace the No.1 cylinder injector. 1. Replace the No.1 cylinder injector. 2. Carry out a test drive with the drive cycle pattern. Refer to PROCEDURE 6 . 3. Check the diagnostic trouble code (DTC). Q: Is DTC P0301 set? YES: Replace the ECM or PCM. Then go to Step 9. NO: The inspection is complete. Fig. 1028: Identifying B-01 Connector Location Courtesy of DAIMLERCHRYSLER CORP. STEP 9. Test the OBD-II drive cycle. 1. Carry out a test drive with the drive cycle pattern. Refer to PROCEDURE 6 . 2. Check the diagnostic trouble code (DTC). Q: Is DTC P0301 set? YES: Retry the troubleshooting. NO: The inspection is complete.

Only thing I can think of is to change the location of the injector, see if the code changes to the new cylinder.

Do a compression test on cyl no. 1 both wet and dry tests and a cylinder leakdown test-

Misfire on a specific cylinder should check sparkplug/compression/injector for that cylinder

Hey rasmataz,

She has done pretty much done all that except for the wet/dry and leak down test. She has replaced the plugs the coil for that cylinder done compression test and replace the injector. I keep reading through this post and I cannot come up with any other ideas to assist.

Hope to find a cure very soon for her.

Thanks for everyones input on this

Mark Shreaves

.

Hi lydiaa,

Ok, you already done the dry test. The the Wet test is when you put a little oil in the cylinder to see if the compression increases or not. The leak down is when you leave the compression and watch it for about 3 mins to see how much it drops.

You are very welcome and I we here at 2car pros had been able to get this problem diagnosed and fix for you. I keep reading over this post with all the replies and still cannot come up with a diagnosis.

I do hope that replacing the Injector again fixes your vehicle. This will be one for the records, at least for me. I do have to admit I am getting better at doing diagnosis over the net. I am much better at hands on in front of me. And I am also learning alot from the other Techs on here.

I would greatly appreciate knowing what the final Diagnosis is for future reference.

.

Rich condition:

Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode

Cleaning the injectors with the engine running can set this code, I think Raz means Open loop mode.

Mr. Merlin that's a big 10-4

I wonder if your crank sensor or gear isnt defective.

Only three possibilties left, Crank sensor or tooth, distributor section, or an as yet unknown PCM problem, just waiting for a new flash update!