What does P0352 mean?

Ignition Coil B Primary/Secondary Circuit Malfunction Check Engine Light on, possible misfire on cylinder #2, rough idle, reduced power and efficiency

AutoFixDB - Free OBD-II diagnostic trouble code lookup. Find causes, symptoms, diagnostic steps and repair solutions.

Overview

DTC P0352 indicates an ignition coil circuit malfunction on cylinder 2. Common causes include failed coil, wiring issues, or PCM faults. Symptoms include misfire, rough idle, and CEL illumination.

Common Symptoms

Check Engine Light illuminated
Rough or erratic engine idle
Engine misfire or hesitation
Reduced power or acceleration
Difficulty starting

Most Common Causes

Faulty ignition coil on cylinder 2 high

Failure in either primary or secondary winding of the coil can trigger the code

Damaged or corroded wiring/connectors to coil circuit high

Open, short to ground, or short to voltage in coil wiring often found

Loose or poor electrical connection at coil or harness medium

Connector pins may be corroded or not fully seated

Faulty PCM or coil driver circuit low

Rare but possible; should be confirmed after wiring and coil tests

Defective spark plug on cylinder #2 medium

Can contribute to misfire symptoms but may not directly trigger P0352

Diagnostic Steps

Confirm code and check for related misfire codes with a professional scan tool

Expected: P0352 present, possibly with P0302

Interpretation: Verifies primary fault is cylinder #2 ignition circuit
Visually inspect ignition coil #2, wiring, and connectors

Expected: No damage, corrosion, broken wires or loose connectors

Interpretation: Presence of damage points to wiring/connector repair
Swap coil #2 with a known-good coil from another cylinder

Expected: If code follows new coil, coil is faulty

Interpretation: Confirms failed ignition coil
Use multimeter/oscilloscope to check primary and secondary coil resistance and signal from PCM

Expected: Resistance within spec and proper control signal pattern

Interpretation: If signal missing or out of spec, check wiring or PCM output
Check continuity between PCM and coil driver circuit, test for shorts

Expected: Continuity and no shorts

Interpretation: Failure indicates wiring harness fault

Repair Solutions

Replace faulty ignition coil on cylinder #2 easy

Estimated Cost: $50 - $250

Common fix when coil fails; cost depends on vehicle and coil type

Repair or replace damaged wiring/connectors medium

Estimated Cost: $30 - $200

Requires diagnosing open/shorted circuits and proper crimping/soldering

Replace spark plug #2 easy

Estimated Cost: $10 - $40

Good practice during ignition coil replacement

Reprogram or replace PCM if confirmed faulty hard

Estimated Cost: $300 - $1200

Only after eliminating wiring and component faults

Common Misdiagnoses

Avoid these common diagnostic mistakes:

Replacing ignition coil without testing wiring harness first
Assuming spark plug failure is primary cause without coil circuit testing
Confusing coil B cylinder number designation without verifying OEM mapping

Frequently Asked Questions

Can you explain the meaning of P0352?

Technically, the P0352 code represents Ignition Coil B Primary/Secondary Circuit Malfunction. It usually points to a fault within the Ignition.

How serious is the P0352 code?

You should treat P0352 as a medium issue. Check Engine Light on, possible misfire on cylinder #2, rough idle, reduced power and efficiency

What are the symptoms of P0352?

Drivers often report: Check Engine Light illuminated, Rough or erratic engine idle, Engine misfire or hesitation when this code is present.

Why is my car throwing a P0352 code?

The most common causes are: Faulty ignition coil on cylinder 2, Damaged or corroded wiring/connectors to coil circuit, Loose or poor electrical connection at coil or harness.

How much does it cost to fix P0352?

It depends on what needs to be fixed. Replace spark plug #2 repairs are cheaper (~$40), while Reprogram or replace PCM if confirmed faulty repairs are on the higher end (~$1200).

Is the P0352 code specific to Chevrolet?

This is a universal code. You might see P0352 on Ford, Chevrolet, Toyota, Honda, Nissan, or any other OBD-II vehicle.

P0352: Ignition Coil B Primary/Secondary Circuit Malfunction