Check engine light comes on. p0171 and p0351 codes found
Runs rough, shifts poorly, idles rough but doesnt stall...OBD II check found several trouble codes, including Ignition coil a primary circuit malfunction, misfire cylinder 1 at startup, lean system on bank 1. Already changed ignition coil on cylinder 1, didnt change plug though.
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Re: Check engine light comes on. p0171 and p0351 codes...
From Lusty Kid:
I know the economy is bad, but change all of the plugs. Check your PCV Valve hose, 150 rottens them out allowing air to be sucked in, thus all kinds of codes.
Depending on mileage. Dismount the EGR valve and clean passages. If you are really good dismount the throtle position sensor body and clean out passages with Choke Cleaner., dismount where the EGR valves connects to the engine, clean out passages. Also check the hose thats behind this mounting to ensure is not clogged. If clogged clean it out. If not replace it. Is about 1.5 ft. long, connects to the PCV Valve Hose.
When is the last time you change your harness. Can't remember??? Replace it. Good Luck
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Feb 5, 2010 - Uploaded by Scotty Kilmer
Scotty Kilmer, mechanic for the last 46 years and counting, shows how to fix your car if the check engine light ...
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
OBD II P0351 Ignition Coil "A" Circuit Primary/Secondary Malfunction
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
Check Engine Light will illuminate
Engine idles rough
Engine misfires on acceleration
In rare cases, the engine may not exhibit noticeable symptoms
Common Problems That Trigger the P0351 Code
Defective Ignition Coil(s)
Defective Spark Plug(s)
Intake Manifold Vacuum leaks
Carbon buildup in the Throttle Body air passages
Defective Idle Air Control Valve or Electronic Body
Ignition coil(s) replaced when cause of the malfunction was a vacuum leak
Spark Plugs replaced when cause of the malfunction was a vacuum leak
Ford P0715 OBD-II Trouble Code Definition:
P0715 Input Shaft Speed Sensor Circuit Malfunction
P0715 Ford OBD-II Trouble CodeDescription:
OBD Trouble Code P0715
Input/Turbine Speed Sensor "A" Circuit
What does the code mean? OBD-ii Code P0715 definition:
The input speed sensor detects the primary pulley revolution speed and sends a signal to the Transmission Control Module (TCM) and Engine Control Module (ECM).
Symptoms Sumptoms of OBD code P0715
- Engine Light ON (or Service Engine Soon Warning Light) - Possible shifting problems
Causes Causes of the OBD-II code P0715
- Transmission speed sensor circuit is open or shorted. - Poor transmission speed sensor circuit connection - Faulty transmission speed sensor The Error code is generally activated on detection of the following conditions: Diagnostic Trouble Code (DTC) P0715 is detected when TCM or ECM does not receive the proper signal from the sensor.
P0361 Ignition Coil K Primary/Secondary Circuit Malfunction
ALL P0xxx codes are universal for ALL OBDII - equipped cars (every car sold in America since '96 model year; and a few mfr's prior to that).
If your '95 is OBD-II, that's the code. BUT, yours *might* be the same goofy "OBD-I.5" that GM put into '94 & '95 GA's; those sockets aren't OBD-II compliant, and God may not even know those old codes.
If the engine seems to run fine over 1450 RPM maybe there is a vacuum hose leaking or EGR valve is slightly stuck open. Any help from the OBD II trouble codes? Or is there simply no MIL and no stored information in the OBD II computer read at the local parts store through the connector by the drivers knee?