P0273 Cadillac Code - Cylinder 5 Injector Control Circuit Low Voltage
Quick Answer
The Engine Control Module (ECM) supplies voltage to each Fuel Injector on the high control circuits. Common causes include Dirty Fuel Injector 5, Faulty Fuel Injector 5, Plugged Fuel Injector 5. 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
- P0273 Cadillac indicates Cylinder 5 Injector Control Circuit Low Voltage.
- Common causes
- Common causes include Dirty Fuel Injector 5, Faulty Fuel Injector 5, Plugged Fuel Injector 5.
- 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 P0273 Cadillac Description
What are the Possible Causes of the DTC P0273 Cadillac?
- Dirty Fuel Injector 5
- Faulty Fuel Injector 5
- Plugged Fuel Injector 5
- Fuel injector 5 harness is open or shorted
- Fuel injector 5 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0273 Cadillac?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0273 Cadillac 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.
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Frequently Asked Questions about P0273 Cadillac Code
1. What does the OBDII code P0273 mean for a Cadillac?
P0273 indicates that the Cylinder 5 Injector Control Circuit is experiencing low voltage, which can affect fuel delivery and engine performance.
2. What are the symptoms of the P0273 code on a Cadillac?
Common symptoms include rough idling, engine misfires, reduced power, poor fuel economy, and possibly the check engine light turning on.
3. What causes the P0273 code in a Cadillac?
Possible causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a bad injector driver in the PCM, or insufficient voltage reaching the injector.
4. Can I drive my Cadillac with the P0273 code?
It’s not recommended to drive with this code, as it can lead to engine misfires and potential damage to other components over time.
5. How do I diagnose the P0273 code on a Cadillac?
Start by inspecting the wiring and connectors for Cylinder 5’s fuel injector, check the voltage and continuity, and test the injector and PCM functionality.
6. How do I fix the P0273 code on a Cadillac?
Repairs may include replacing the faulty injector, repairing or replacing damaged wiring/connectors, or replacing the PCM if it’s found to be defective.
7. How much does it cost to fix the P0273 code on a Cadillac?
Costs vary depending on the issue, but replacing a fuel injector typically costs $200-$500, while PCM replacements can be $500-$1500, excluding labor.
8. Can a dirty fuel injector cause the P0273 code?
A dirty or clogged injector is unlikely to cause low voltage but may cause other injector-related issues. This code usually points to electrical problems.
9. Is the P0273 code specific to Cadillac vehicles?
No, P0273 is a generic OBDII code, so it can appear on other vehicles, but the diagnosis and repair may vary by make and model.
10. What tools are needed to diagnose the P0273 code on a Cadillac?
You’ll need an OBDII scanner, a multimeter, and possibly wiring diagrams for your specific Cadillac model to properly diagnose the issue.
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