Checked firing plug 3&2 brite #1&4 very week
0351 code points to a ignition coil fault, if coils ok check HT cables and spark plugs, also check for vacuum leaks, clean throttle body and check throttle position switch. make sure the timing belt has not jumped a tooth.
From a reputable repair website:
P0351 - OBD-II Trouble Code
Auto Systems and Repair
Ignition Coil "A" Circuit Primary/Secondary Malfunction
Our emissions expert has put together the following information about the P0351 fault code. We have also included diagnostic procedures you can take to your repair shop if the mechanic is having difficulty analyzing the code.
OBD II Fault Code
What does this mean? The ignition coil or coils are responsible for igniting the air/fuel mixture inside the combustion chambers. Without reliable performance from the ignition coil(s) the vehicle will stumble and misfire.
Code P0351 indicates there's an electrical problem in either the primary ( the computer side ) or the secondary ( the spark plug side ) of the Ignition Coil "A" Circuit.
Symptoms
Common Problems That Trigger the P0351 Code
Common Misdiagnosis
Testimonial: "check it with sparkplug light it is very dim light for 1&4 very bright for 2&3 vacuum leak would not cause this would it? thank you for trying to help me"
SOURCE: 2002 Ford Focus 2.0l SOHC running on 3 cylinders
I had this problem too exept I have no clue what parts or blah b;ah blah. I just know that my coil pack was getting fried.burnt out because my wires were bad. The mechanic I went to was a moron because I took the car to him 3 times and he kept saying it was the coil ad kept replacing it. I took it to my uncle and he said my wires were in horrible shape and when this is the problem it fries your coil making your car run like a lawn mower! Well all i did was replace my wires and the car ran great! Well I hope this helped..
SOURCE: No Start. OBDii Code P2305.
i have the same problem could someone please help ? its getting cold outside and i live 30 miles from my job.
SOURCE: 96 ford explorer code p0301 mis fire 1
Sounds like either a bad plug wire, or coil pack. This is about all that would cause the misfire.
SOURCE: 2001 ford windstar-new coil pack,new spark plugs
head gasket?? blowing between two cylinders
SOURCE: FORD F150 4.6 L Engine
Several thnigs to check there; review all informastion disponible to do it and solve this...
P0356 - Ignition Coil F Primary/Secondary Circuit Malfunction
The ignition signal from the Powertrain Control Module (PCM) or Electronic Control Module(ECM) is sent to and amplified by the power transistor. The power transistor turns ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil secondary circuit.
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- The engine may be harder to start
- Engine hesitation
Possible Causes:
- Open or short in the ignition coil circuit
- Ignition coil circuit shorted to ground
- Ignition coil connector
- Damaged ignition coil
- Damaged PCM or ECM
Possible Solution:
- If damage, repair ignition coil circuit
- Replaced ignition coil
- Replaced PCM or ECM
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P0152 - O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)
The heated oxygen sensor 1 is placed into the exhaust manifold. It
detects the amount of oxygen in the exhaust gas compared to the outside
air. The heated oxygen sensor 1 has a closed-end tube made of ceramic
zirconia. The zirconia generates voltage from approximately 1V in richer
conditions to 0V in leaner conditions. The heated oxygen sensor 1
signal is sent to the ECM. The ECM adjusts the injection pulse duration
to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs
near the radical change from 1V to 0V.
Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust
Possible Causes:
- Harness or connectors (The heated oxygen sensor 1 heater circuit is open or shorted.)
- Front Heater oxygen sensor heater (Bank 2) may be faulty
Possible Solution:
Replacing the O2 Sensor 1 usually takes care of the problem
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P0174 - Fuel Injection System Too Lean Bank 2
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual
mixture ratio can be brought closely to the theoretical mixture ratio
based on the mixture ratio feedback signal from the heated oxygen
sensors 1. The ECM calculates the necessary compensation to correct the
offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large (The
actual mixture ratio is too lean.), the ECM judges the condition as the
fuel injection system malfunction and light up the MIL (2 trip detection
logic).
Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
Possible Causes:
- Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection
Possible Solution:
Dirty air filter of faulty air flow sensor are common causes of the problem.
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P2197 - DODGE - Sys Too Rich at Hier Load Bank1
Means that the O2 sensors on each bank are seeing WAY
too much oxygen in the exhaust gas. In normal operation the signal from
the O2 sensors should swing back and forth between rich and lean.
Your sensors are locked on lean.
Those codes are the same as P0174 (and P0171). Sounds like you have a
vacuum leak somewhere. Most common place is the PCV elbow where it
connects to the throttle body adapter.
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Hope this helps; keep in touch.
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