P1203 Honda Code - Fuel System Failure Caused No. 3 Cylinder Misfire
Quick Answer
P1203 Honda indicates Fuel System Failure Caused No. 3 Cylinder Misfire. Common causes include Ignition spark, Check primary and secondary ignition, Check fuel system. 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
- P1203 Honda indicates Fuel System Failure Caused No. 3 Cylinder Misfire.
- Common causes
- Common causes include Ignition spark, Check primary and secondary ignition, Check fuel system.
- 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 P1203 Honda Description
What are the Possible Causes of the DTC P1203 Honda?
- Ignition spark
- Check primary and secondary ignition
- Check fuel system
- Fuel pressure and injector
- Check for vacuum leaks
- Check engine mechanical condition
How to Fix the DTC P1203 Honda?
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 P1203 Honda 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 P1203 Honda code?
Need more information on how to fix the P1203 Honda code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1203 Honda code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1203 Honda Code
What does the OBDII code P1203 mean on a Honda?
P1203 indicates a fuel system failure that has caused a misfire in cylinder No. 3, potentially due to issues like fuel delivery, ignition problems, or a mechanical fault.
What are the common symptoms of a P1203 code on a Honda?
Symptoms may include rough idling, reduced engine performance, poor fuel economy, engine misfires, or the Check Engine Light turning on.
What causes the P1203 code to appear?
The code is often triggered by a faulty fuel injector, ignition coil, spark plug, clogged fuel lines, low fuel pressure, or internal engine damage in cylinder No. 3.
Can a dirty or faulty fuel injector cause the P1203 code?
Yes, a clogged or malfunctioning fuel injector in cylinder No. 3 can disrupt fuel delivery, leading to a misfire and triggering the code.
How do I diagnose the P1203 code on my Honda?
Start by scanning the vehicle with an OBDII scanner to confirm the code, then inspect the No. 3 cylinder’s fuel injector, spark plug, ignition coil, and fuel system components for faults.
Is it safe to drive with a P1203 code?
Driving with this code is not recommended, as continued misfires can cause engine damage, poor performance, and potential catalytic converter failure.
How can I fix the P1203 code?
Repairs may include replacing a faulty fuel injector, ignition coil, or spark plug in cylinder No. 3, cleaning the fuel system, or addressing any mechanical issues in the engine.
Can a vacuum leak cause the P1203 code?
While uncommon, a vacuum leak near cylinder No. 3 can disrupt the air-fuel mixture and potentially contribute to a misfire.
How much does it cost to repair a P1203 code on a Honda?
Repair costs vary but may range from $150 to $500 or more, depending on whether components like the fuel injector or ignition coil need replacement.
Can a failing fuel pump trigger the P1203 code?
Yes, a failing fuel pump can reduce fuel pressure, affecting cylinder No. 3 and potentially causing a misfire that triggers the P1203 code.
Discuss the causes and fixes for P1203 Honda OBDII Code
Code P1203 Honda comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
