P1239 Cadillac Code - Fuel Injector 6 Control Circuit Shorted
Quick Answer
The Engine Control Module (ECM) supplies voltage to each fuel injector on the injector positive voltage control circuits. Common causes include Faulty Fuel Injector 6, Fuel Injector 6 harness is open or shorted, Fuel Injector 6 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
- P1239 Cadillac indicates Fuel Injector 6 Control Circuit Shorted.
- Common causes
- Common causes include Faulty Fuel Injector 6, Fuel Injector 6 harness is open or shorted, Fuel Injector 6 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 P1239 Cadillac Description
What are the Possible Causes of the DTC P1239 Cadillac?
- Faulty Fuel Injector 6
- Fuel Injector 6 harness is open or shorted
- Fuel Injector 6 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P1239 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1239 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 P1239 Cadillac Code
1. What does the OBDII code P1239 mean on a Cadillac?
P1239 indicates that the control circuit for fuel injector 6 has a short, preventing proper injector operation.
2. What are the common symptoms of code P1239 in a Cadillac?
Symptoms include rough idling, engine misfires, reduced fuel efficiency, and potential difficulty starting the vehicle.
3. What causes the P1239 code in a Cadillac?
Common causes include damaged wiring or connectors, a faulty fuel injector, or a malfunctioning engine control module (ECM).
4. Can I drive my Cadillac with the P1239 code active?
Driving with this code is not recommended, as it can cause further damage to the engine and reduce performance.
5. How do I diagnose the P1239 code on a Cadillac?
Start by inspecting the wiring and connectors for injector 6, then test the fuel injector itself and the ECM for faults.
6. How can I fix the P1239 code on my Cadillac?
Repairs may involve replacing damaged wiring, connectors, or the fuel injector. In rare cases, the ECM may need to be replaced or reprogrammed.
7. How much does it cost to repair code P1239 on a Cadillac?
Repair costs vary but typically range from $200 to $500, depending on whether the issue is wiring-related or requires injector replacement.
8. Can a clogged injector cause the P1239 code?
No, this code specifically refers to a short in the control circuit, not a clogged injector.
9. How do I prevent code P1239 from returning?
Regular maintenance, including checking wiring and keeping the fuel system clean, can help prevent this issue.
10. Will clearing the P1239 code fix the problem on a Cadillac?
Clearing the code will turn off the check engine light temporarily, but the underlying issue must be fixed to prevent the code from returning.
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