P1236 Chevrolet Code - Fuel Injector 5 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 5, Fuel Injector 5 harness is open or shorted, Fuel Injector 5 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
- P1236 Chevrolet indicates Fuel Injector 5 Control Circuit Shorted.
- Common causes
- Common causes include Faulty Fuel Injector 5, Fuel Injector 5 harness is open or shorted, Fuel Injector 5 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 P1236 Chevrolet Description
What are the Possible Causes of the DTC P1236 Chevrolet?
- Faulty 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 P1236 Chevrolet?
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 P1236 Chevrolet 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 P1236 Chevrolet Code
1. What does the OBDII code P1236 mean on a Chevrolet?
P1236 indicates a short circuit in the control circuit for fuel injector 5, which could prevent proper fuel delivery to the corresponding cylinder.
2. What are the common symptoms of the P1236 code?
Symptoms may include engine misfires, rough idling, reduced fuel efficiency, hesitation during acceleration, and an illuminated check engine light.
3. What causes the P1236 code to appear on a Chevrolet?
The code is typically caused by a shorted or damaged wiring harness, a faulty fuel injector, a malfunctioning engine control module (ECM), or corroded electrical connections.
4. Can I drive my Chevrolet with the P1236 code?
It’s not recommended to drive with this code active, as it can lead to poor engine performance and potentially cause further damage to the engine or catalytic converter.
5. How do you diagnose the P1236 code in a Chevrolet?
Diagnosis involves checking the wiring and connectors for damage, testing the injector for proper resistance, and using a scan tool to monitor injector operation.
6. How do I fix the P1236 code on my Chevrolet?
Repairs may include replacing the faulty fuel injector, repairing or replacing damaged wiring, cleaning electrical connections, or in rare cases, replacing the ECM.
7. How much does it cost to repair the P1236 code?
The cost varies depending on the issue, but replacing a fuel injector typically ranges from $200 to $500, while wiring repairs can cost $50 to $200.
8. Can a faulty ECM cause the P1236 code?
Yes, though it is less common, a malfunctioning ECM can fail to properly control the injector circuit and trigger the P1236 code.
9. Will clearing the code with a scan tool fix the problem?
Clearing the code may turn off the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.
10. What tools are needed to troubleshoot the P1236 code?
Tools include an OBDII scan tool, a digital multimeter for testing resistance and voltage, and possibly a noid light to check injector pulse signals.
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