P1351 Chevrolet Code - Ignition Control Module Circuit High Voltage
Quick Answer
The Ignition Control Module (ICM) has independent power and ground circuits. Common causes include Faulty Ignition Control Module, Ignition Control Module harness is open or shorted, Ignition Control Module 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
- P1351 Chevrolet indicates Ignition Control Module Circuit High Voltage.
- Common causes
- Common causes include Faulty Ignition Control Module, Ignition Control Module harness is open or shorted, Ignition Control Module 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 P1351 Chevrolet Description
-The ignition control (IC) timing signal
-The IC timing control
-The low resolution engine speed signal
-The medium resolution engine signal
-The camshaft position signal
-The low reference
The ICM sends 3X signals to the PCM, and controls the timing advance during engine cranking. The timing advance changes to PCM control after the following actions occur:
The PCM receives the second 3X signal
The PCM applies 5 volts to the ignition control (IC) timing signal circuit.
The ICM monitors the CKP sync signal when the engine is cranking. The CKP sync signal is passed from the CKP sensor to the ICM on the CKP sensor 2 signal circuit. The CKP sync signal is used to determine the correct cylinder pair and initiate the ignition coil firing sequence. The 18X reference pulses are passed from the CKP sensor to the ICM on the CKP sensor 1 circuit. The 18X reference pulses are used for fuel injection and ignition control. After the ICM receives both signals, the ICM passes the 18X and 3X reference signals to the PCM. The CMP and the CKP sensors share a 12 volt reference and low reference circuit. The CKP sensor consists of the following circuits:
-A 12 volt reference
-A low reference
-A CKP sensor 1 signal
-A CKP sensor 2 signal
What are the Possible Causes of the DTC P1351 Chevrolet?
- Faulty Ignition Control Module
- Ignition Control Module harness is open or shorted
- Ignition Control Module circuit poor electrical connection
How to Fix the DTC P1351 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 P1351 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 P1351 Chevrolet Code
1. What are the common symptoms of OBDII code P1351 in a Chevrolet related to the Ignition Control Module Circuit High Voltage?
- Common symptoms include rough engine idle, engine misfires, difficulty starting the vehicle, and a noticeable decrease in engine performance.
2. What are the potential causes of the P1351 code in a Chevrolet indicating Ignition Control Module Circuit High Voltage?
- The code P1351 in a Chevrolet typically indicates a faulty ignition control module, damaged wiring or connectors in the ignition system, or a problem with the ignition coil.
3. How can I diagnose the Ignition Control Module Circuit High Voltage issue causing the P1351 code in my Chevrolet?
- Diagnosing the issue involves checking the ignition control module, inspecting the wiring and connectors for any damage, and testing the ignition coil for proper functioning using a multimeter.
4. Can a faulty spark plug or spark plug wire trigger the P1351 code in a Chevrolet?
- Yes, a faulty spark plug or spark plug wire can potentially cause the P1351 code by affecting the ignition system's performance and leading to high voltage issues.
5. What are some repair tips for resolving the P1351 code related to the Ignition Control Module Circuit High Voltage in a Chevrolet?
- Repair tips include replacing the ignition control module, repairing or replacing damaged wiring and connectors, checking and replacing the ignition coil if necessary, and ensuring proper spark plug and spark plug wire functionality.
6. Is it safe to continue driving my Chevrolet with the P1351 code indicating Ignition Control Module Circuit High Voltage?
- It is not recommended to continue driving your Chevrolet with the P1351 code, as it can lead to further engine damage and potential safety hazards. It is best to address the issue promptly.
7. Can resetting the OBDII system clear the P1351 code in a Chevrolet related to the Ignition Control Module Circuit High Voltage?
- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and fix the root cause of the problem.
8. Are there any preventative maintenance steps I can take to avoid encountering the P1351 code in my Chevrolet?
- Regular maintenance of the ignition system, including replacing spark plugs and spark plug wires at recommended intervals, can help prevent issues that may trigger the P1351 code.
9. How much does it typically cost to repair the Ignition Control Module Circuit High Voltage problem causing the P1351 code in a Chevrolet?
- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500 for parts and labor, including replacing the ignition control module or addressing wiring/connectors.
10. Can a DIY enthusiast with basic automotive knowledge fix the P1351 code related to the Ignition Control Module Circuit High Voltage in a Chevrolet?
- Depending on the specific issue, a DIY enthusiast with basic automotive knowledge may be able to address the problem, such as replacing spark plugs or checking wiring connections. However, more complex tasks like replacing the ignition control module may require professional assistance.
Discuss the causes and fixes for P1351 Chevrolet OBDII Code
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I have a 1998 Chevy Taho with 5.7L engine. I'm getting a P1351 code and wont start. Turns over easy then real hard like advanced timming. Replaced ICM still same thing. What is the CKP sensor and location. Is that the next part to check?
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According to a national database of repairs, the next part is the distributor cap and rotor. Do you have any more codes?
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JD, Have a 98 k1500 5.7 vortex every once in a while i get a p1351 code when it want start on first attempt. This started just after i had a p0300 code which was, is # 5,7,6,and Sometimes #2 misfire. So far i have changed the following: plugs ,wires,cap,rotor, ignition coil, ignition module, fuel injectors, fuel pump. I still get the misfires in the higher RPMs between 2100 RPMs and up C 1351 code pops every once in awhile when the truck is hard to start on first attempt starts fine on second attempt. And this is a new remanufactured motor that has approximately 1,151.5 miles on it and just over 13 months old. Just for the hell of it I did a compression test and I got a hundred seventy eight PSI plus or minus one or two on all 8 cylinders. I am at my Wit's End and have no idea what to do next. I did buy a new distributor assembly to put in have not had a chance to do that as of now.
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I haven't seen that problem before, but I check a national database of repairs, and after Ignition Control Module, Distributor Cap and Rotors, and Ignition Coil, the distributor is one of the most likely problems that can trigger the P1351 code.
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Just a update it was the Distributor, the gear teeth were worn razor thin (sharp as a knife ) I had to swap out the mountain brackets because mine dist needed to be adjustable and the new one was not . Had to Barrow a timing light. Could not find mine. LOL I may still need to fine adjust it latter after i check MPG. Not sure why it wore out like it did. Any ideas. (178,546.0 miles on it)
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Thank you for letting us know. I don't think there is nothing wrong, just the 20 years of use. Surprise it lasted that long.
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got it running no codes but still need to put a saner on it to do fine tuning on computer. hope to get better gas mileage
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Thanks for posting, J.D.: I went down the same path, lol. I will be buying a new distributor next based on your experience. Have a great day!
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Not true just did tune up with cap rotor and plugs wires now giving code 1351 and put new moudle in and still ahowing code.... wont start
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If you have already replaced the Ignition Control Module, then the next step is the distributor cap and rotor. But if you already replaced the distributor cap and rotor, then the next step is the Ignition Control Module.
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