P1650 Pontiac Code - PCM Output Controls Fault
Quick Answer
The Quad Driver Module (QDM) is an electronic switch that completes a ground circuit when switched on. Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain 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
- P1650 Pontiac indicates PCM Output Controls Fault.
- Common causes
- Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain 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 P1650 Pontiac Description
The Diagnostic Trouble Code (DTC) P1650 and P1651 will set if there is an open, short to ground or short to voltage on any of the QDM output circuits, faulty MIL circuit, faulty upshift light circuit, faulty cooling fan relay circuit or A/C relay circuit. Fault detected for 5 seconds will set P1651. Fault detected for 20 seconds will set P1650. The QDM circuit is continuously checked when the engine is running.
The Quad Driver Module (QDM) is part of the Powertrain Control Module (PCM).
What are the Possible Causes of the DTC P1650 Pontiac?
- Faulty Powertrain Control Module (PCM)
- Powertrain Control Module harness is open or shorted
- Powertrain Control Module circuit poor electrical connection
How to Fix the DTC P1650 Pontiac?
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 P1650 Pontiac 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 P1650 Pontiac Code
1. What does the OBDII code P1650 mean on a Pontiac?
P1650 indicates a fault in the Powertrain Control Module (PCM) related to output controls, meaning the PCM is detecting an issue with one or more circuits it controls.
2. What are the common symptoms of the P1650 code on a Pontiac?
Symptoms may include the check engine light turning on, issues with electrical components like the cooling fan or A/C clutch, and possible engine performance problems.
3. What causes the P1650 code to appear on a Pontiac?
Common causes include faulty relays, damaged wiring, a failed PCM, or malfunctioning components controlled by the PCM, such as the A/C relay or cooling fan relay.
4. Can a loose or damaged wire trigger the P1650 code?
Yes, damaged, corroded, or loose wiring in the PCM output control circuits can cause the P1650 code to trigger.
5. How do you diagnose the P1650 code on a Pontiac?
Start by scanning for additional codes, inspecting wiring and connectors for damage, testing the affected relays or components, and checking the PCM for proper function.
6. Can a bad relay cause the P1650 code?
Yes, a faulty relay controlling components like the cooling fan or A/C system can cause the P1650 code.
7. Is it safe to drive with the P1650 code active on a Pontiac?
It depends on the affected components. If critical systems like the cooling fan are impacted, driving could lead to engine overheating or other problems.
8. How do you fix the P1650 code on a Pontiac?
Repairs may include replacing damaged wiring, faulty relays, or the PCM itself if it's determined to be defective.
9. Can a PCM reflash fix the P1650 code?
In some cases, a PCM reflash or software update may resolve the issue if it’s caused by a programming error.
10. How much does it cost to repair the P1650 code on a Pontiac?
Repair costs vary but typically range from $100 to $500, depending on whether you need to replace wiring, relays, or the PCM.
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