The P1351 code indicates a problem with the ignition coil "A" primary/secondary circuit, which can cause poor engine performance, increased fuel consumption, and stalling or hesitation.
Symptoms of this issue include misfires, rough engine idling, and trouble starting the engine.
The causes of this problem range from corrosion or damage to the ignition coil wiring or connections to faulty throttle body or accelerator pedal.
To fix the issue, start by identifying the root cause and then replace or repair the faulty component.
What does this code mean
When your Buick's engine has a problem, the code P1351 appears.
This code means there's an issue with the ignition coil "A" primary/secondary circuit.
The car's computer, the Engine Control Module (ECM), finds a problem with the circuit that makes sparks in the engine's cylinders.
This circuit problem can cause the engine to run poorly and use more fuel.
What are the symptoms
The symptoms of a problem with the ignition coil "A" primary/secondary circuit, which triggers the P1351 code, are:
- The check engine light comes on, indicating a problem with the ignition system.
- The engine misfires or runs rough, leading to poor performance and low fuel efficiency.
- You may notice less power when accelerating, especially when driving uphill or carrying heavy loads.
- The engine may stall or hesitate when idling.
- In severe cases, you may have trouble starting the engine.
What are the causes
Faulty ignition coil "A" primary/secondary circuit issues can have several causes.
Corrosion or damage to the ignition coil wiring or connections can disrupt the circuit.
The ignition coil itself can be faulty, causing problems with the primary/secondary circuit.
A malfunctioning crankshaft position sensor can trigger the error code, affecting the ignition coil's operation.
Worn-out or fouled spark plugs can also contribute to the faulty ignition coil "A" primary/secondary circuit issues.
What Tools are Needed to diagnose
To diagnose faulty ignition coil "A" primary/secondary circuit issues, you need these tools:
- A digital multimeter (DMM) to measure voltage, resistance, and continuity
- A scan tool or code reader to retrieve trouble codes and monitor live data
- A wiring diagram to identify and trace the ignition coil "A" primary/secondary circuit
- A test light or spark tester to verify spark presence and quality
How to fix Step by Step
Step 1: Locate the faulty pedal position sensor and disconnect its electrical connector.
Step 2: Remove the sensor's mounting screws and gently pull it out of its bracket.
Step 3: Install the new sensor, ensuring it's securely fastened and properly seated.
Step 4: Reconnect the electrical connector, making sure it's snug and not loose.
Step 5: Clear the P1351 code using your scan tool, then test the system to ensure the repair was successful.
If the code persists, you may need to adjust the throttle body or replace other related components.
What are the Common Diagnosis Mistakes
When fixing a car problem, it's easy to make mistakes that can lead to more issues.
These mistakes include:
- Not checking wiring and connections for damage or corrosion
- Not calibrating the pedal position sensor correctly after replacing it
- Not considering other possible causes of the P1351 code, such as a faulty throttle body or accelerator pedal
- Not doing a thorough test drive to confirm the problem is fixed
What is the Repair Cost
The repair cost for the P1351 code can range from $100 to $1,000 or more, depending on the cause.
Labor costs add $75 to $150 per hour. You'll likely spend at least a few hundred dollars to fix your Buick.
Can I drive safely with this code?
No, it's not recommended to drive safely with a P1351 code.
The issue can cause misfires, stalling, and loss of power, especially uphill or with heavy loads.
It's crucial to address the problem as soon as possible to ensure your safety on the road.