P1354 GMC Code - Ignition Control Module Output High/Pulse Detected When Grounded Cylinder 4
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
- P1354 GMC indicates Ignition Control Module Output High/Pulse Detected When Grounded Cylinder 4.
- 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 P1354 GMC 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 P1354 GMC?
- Faulty Ignition Control Module
- Ignition Control Module harness is open or shorted
- Ignition Control Module circuit poor electrical connection
How to Fix the DTC P1354 GMC?
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 P1354 GMC 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 P1354 GMC Code
1. What are the common symptoms of OBDII code P1354 in a GMC vehicle?
Symptoms may include rough idling, engine misfires, loss of power, and illuminated Check Engine Light.
2. What does the OBDII code P1354 indicate in a GMC vehicle?
P1354 indicates that the Ignition Control Module has detected a high voltage or pulse on the output circuit when grounded for Cylinder 4.
3. What are the possible causes of OBDII code P1354 in a GMC vehicle?
Possible causes include a faulty Ignition Control Module, wiring issues, a defective spark plug, or a problem with the ignition coil for Cylinder 4.
4. How can I diagnose the OBDII code P1354 in my GMC vehicle?
Diagnosis typically involves checking the Ignition Control Module, inspecting the wiring for any damage, testing the spark plug and ignition coil for Cylinder 4, and using a scan tool to monitor live data.
5. Can I still drive my GMC vehicle with OBDII code P1354 present?
It is not recommended to drive the vehicle with code P1354 present, as it can lead to further damage and poor engine performance. It is best to address the issue promptly.
6. How can I repair OBDII code P1354 in my GMC vehicle?
Repair may involve replacing the Ignition Control Module, repairing any damaged wiring, replacing the spark plug or ignition coil for Cylinder 4, and clearing the trouble codes.
7. Are there any DIY tips for fixing OBDII code P1354 in a GMC vehicle?
While some basic checks like inspecting wiring connections can be done DIY, it is recommended to seek professional help for accurate diagnosis and repair of this code.
8. Can a bad spark plug cause OBDII code P1354 to appear in a GMC vehicle?
Yes, a faulty spark plug for Cylinder 4 can cause misfires and trigger code P1354 due to improper ignition timing and voltage irregularities.
9. How important is it to address OBDII code P1354 promptly in a GMC vehicle?
It is crucial to address code P1354 promptly to prevent potential engine damage, improve fuel efficiency, and ensure optimal performance of the vehicle.
10. Is it necessary to reset the ECU after repairing OBDII code P1354 in a GMC vehicle?
Yes, it is recommended to clear the ECU memory using a scan tool after repairing code P1354 to ensure that the issue has been resolved and the system resets properly.
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