P2303 Code - Ignition Coil 'B' Primary Control Circuit Low
Quick Answer
The current flow, or dwell, through the primary ignition coil is controlled by the Powertrain Control Module (PCM) by providing a switched ground path through the ignition coil driver to ground. Common causes include Faulty Ignition Coil 'B', Ignition Coil 'B' harness is open or shorted, Ignition Coil 'B' circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P2303 indicates Ignition Coil 'B' Primary Control Circuit Low.
- Common causes
- Common causes include Faulty Ignition Coil 'B', Ignition Coil 'B' harness is open or shorted, Ignition Coil 'B' circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P2303 Description
What are the Possible Causes of the DTC P2303?
- Faulty Ignition Coil 'B'
- Ignition Coil 'B' harness is open or shorted
- Ignition Coil 'B' circuit poor electrical connection
How to Fix the DTC P2303?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2303 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P2303 code?
Need more information on how to fix the P2303 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2303 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P2303 Audi — Ignition Coil 2 Primary Control Circuit Low
- P2303 Buick — Ignition Coil 2 Control Circuit Low Voltage
- P2303 Cadillac — Ignition Coil 2 Control Circuit Low Voltage
- P2303 Chevrolet — Ignition Coil 2 Control Circuit Low Voltage
- P2303 Chrysler — Ignition Coil 'B' Primary Control Circuit Low
- P2303 Dodge — Ignition Coil 'B' Primary Control Circuit Low
- P2303 Ford — Ignition Coil 'B' Primary Control Circuit Low
- P2303 GMC — Ignition Coil 2 Control Circuit Low Voltage
- P2303 Jeep — Ignition Coil 'B' Primary Control Circuit Low
- P2303 Lincoln — Ignition Coil 'B' Primary Control Circuit Low
- P2303 Mercury — Ignition Coil 'B' Primary Control Circuit Low
- P2303 Suzuki — Ignition Coil 2 Primary Control Circuit Low
- P2303 Volkswagen — Ignition Coil 2 Primary Control Circuit Low
Frequently Asked Questions about P2303 Code
1. What are the common symptoms of OBDII code P2303 (Ignition Coil 'B' Primary Control Circuit Low)?
Symptoms may include engine misfires, rough idle, loss of power, and illuminated Check Engine Light.
2. What can cause the ignition coil 'B' primary control circuit to show a low voltage?
Potential causes of P2303 include a faulty ignition coil, damaged wiring or connectors, a faulty Engine Control Module (ECM), or a poor electrical connection.
3. How can I diagnose the issue related to OBDII code P2303?
Diagnosis typically involves checking the ignition coil 'B', inspecting the wiring harness for any damage, and using a multimeter to test the circuit's resistance and continuity.
4. Can driving with OBDII code P2303 cause further damage to my vehicle?
Continuing to drive with this issue can potentially lead to permanent damage to the ignition system, catalytic converter, or other engine components.
5. How can I repair OBDII code P2303 (Ignition Coil 'B' Primary Control Circuit Low)?
Repair options may include replacing the faulty ignition coil, repairing damaged wiring or connectors, resetting the ECM, or ensuring proper electrical connections.
6. Is it safe to ignore OBDII code P2303 and continue driving my vehicle?
It is not recommended to ignore this code, as it can lead to decreased performance, reduced fuel efficiency, and potential engine damage over time.
7. Can a DIY enthusiast fix OBDII code P2303 at home?
Depending on their skills and tools, some DIY enthusiasts may be able to address this issue by following repair guides, but professional expertise is recommended for accurate diagnosis and repair.
8. How much does it typically cost to repair OBDII code P2303?
The cost of repairs can vary based on the underlying cause and whether you choose to address the issue yourself or seek assistance from a professional mechanic. Costs may range from a few dollars for a DIY fix to a couple of hundred dollars for professional repair services.
9. Will resetting the Check Engine Light resolve OBDII code P2303?
Resetting the Check Engine Light may temporarily turn off the warning indicator, but it will not fix the underlying issue causing code P2303. It is essential to diagnose and address the root cause to prevent further problems.
10. How can I prevent OBDII code P2303 from occurring in the future?
Regular maintenance, such as checking and replacing ignition coils as needed, inspecting wiring harnesses for damage, and ensuring proper electrical connections, can help prevent the recurrence of code P2303.
Discuss the causes and fixes for P2303 OBDII Code
-
Service replaced number of ingnition coils in my car, and was not able to figurout why. Problem was socket, I used copper paste for better electrical lead
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
