Hi there:
DTC P0353 - Ignition Coil C Primary/Secondary Circuit Malfunction
The COP
(coil on plug) ignition system is what is used on most modern engines.
There is an individual coil for each cylinder that is controlled by the
PCM (powertrain control module). It eliminates the need for spark plug
wires by putting the coil right above the sparkplug. Two wires are
dedicated to each coil. One is a battery feed usually from the power
distribution center. The other wire is the coil driver circuit from the
PCM. The PCM grounds/ungrounds this circuit to activate or deactivate
the coil. The coil driver circuit is monitored by the PCM for faults
If
an open or a short is detected in the driver circuit for coil number 3,
a P0353 may set. Also, depending on the vehicle, the PCM may also shut
down the fuel injector to the cylinder also.
Symptoms of a P0353 DTC may include:
MIL (Malfunction indicator lamp) illumination
Engine misfire may be present or intermittent
Potential causes of a P0353 code include:
Short to voltage or ground on COP driver circuit
Open on COP driver circuit
Loose connection at coil or broken connector locks
Bad Coil (COP)
Faulty Powertrain Control Module
Possible Solutions:
Is
the engine misfiring presently? If not, the problem is likely
intermittent. Try wiggle testing the wiring at the #3 coil and along the
wiring harness to the PCM. If manipulating the wiring causes the
misfire to surface, repair the wiring problem. Check for poor connection
at the coil connector. Verify the harness isn't misrouted or chafing on
anything. Repair as necessary
If the engine is misfiring
presently, stop the engine and disconnect the #3 coil wiring connector.
Then start the engine and check for a driver signal to the #3 coil.
Using a scope will give you a visual pattern to observe, but since most
people don't have access to one there's an easier way. Use a Voltmeter
in AC Hertz scale and see if there's a Hz reading of between 5 and 20 or
so that indicates the driver is working. If there is a Hertz signal,
then replace the #3 ignition coil. It's likely bad. If you don't detect
any frequency signal from the PCM on the ignition coil driver circuit
indicating the PCM is grounding/ungrounding the circuit (or there is no
visible pattern on the scope if you have one) then leave the coil
disconnected and check for DC voltage on the driver circuit at the
ignition coil connector. If there is any significant voltage on that
wire then there is a short to voltage somewhere. Find the short and
repair it.
If there is no voltage on the driver circuit, then
turn the ignition off. Disconnect the PCM connector and check the
continuity of the driver between the PCM and the coil. If there is no
continuity repair the open or short to ground in the circuit. If
continuity is present, then check for resistance between ground and the
ignition coil connector. There should be infinite resistance. If there
isn't, repair the short to ground in the coil driver circuit
NOTE:
If the ignition coil driver signal wire is not open or shorted to
voltage or ground and there is no trigger signal to the coil then
suspect a faulty PCM coil driver. Also keep in mind that if the PCM
driver is at fault, there may be a wiring problem that caused the PCM
failure. It's a good idea to do the above check after PCM replacement to
verify there won't be a repeat failure. If you find that the engine
isn't misfiring, the coil is being triggered properly but P0353 is
continually being reset, there is the possibility that the PCM coil
monitoring system may be faulty.
Hope this helps; also keep in mind that your feedback is important and
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Thank you for using FixYa, have a nice day.
SOURCE: obd code P1131 and PO174
P1131 - Heated Oxygen Sensor (HO2S) Circuit Low Variance Bank 1 Sensor 2
P0174 - Fuel Trim System Lean Bank 2
Clean the MAF sensor and check for vacuum leaks at the intake manfold or the injector O rings.
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