P1691 Volkswagen Code - Malfunction Indicator Lamp Open Circuit
Quick Answer
The Malfunction Indicator Lamp (MIL) lights up when emissions relevant malfunctions are recognized by the Engine Control Module (ECM). Common causes include Faulty Malfunction Indicator Lamp (MIL), Malfunction Indicator Lamp harness is open or shorted, Malfunction Indicator Lamp 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
- P1691 Volkswagen indicates Malfunction Indicator Lamp Open Circuit.
- Common causes
- Common causes include Faulty Malfunction Indicator Lamp (MIL), Malfunction Indicator Lamp harness is open or shorted, Malfunction Indicator Lamp 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 P1691 Volkswagen Description
What are the Possible Causes of the DTC P1691 Volkswagen?
- Faulty Malfunction Indicator Lamp (MIL)
- Malfunction Indicator Lamp harness is open or shorted
- Malfunction Indicator Lamp circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P1691 Volkswagen?
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 P1691 Volkswagen 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 P1691 Volkswagen Code
1. What does the OBDII code P1691 mean on a Volkswagen?
P1691 indicates a Malfunction Indicator Lamp (MIL) Open Circuit, meaning the circuit responsible for illuminating the check engine light is faulty or disrupted.
2. What are the symptoms of the P1691 code in a Volkswagen?
The primary symptom is the check engine light not illuminating when it should, along with the potential loss of diagnostic functionality.
3. What causes the P1691 code to appear?
Common causes include a damaged MIL bulb, faulty wiring or connectors in the circuit, or a malfunctioning engine control module (ECM).
4. How can I diagnose the P1691 code on my Volkswagen?
Begin by checking the MIL bulb and associated wiring for damage or disconnection. Use a multimeter to test continuity in the circuit and inspect the ECM for faults.
5. Can the P1691 code affect vehicle performance?
While the code itself may not directly affect performance, it can prevent proper diagnostics of other engine issues, potentially leading to unresolved problems.
6. How do I fix the P1691 code on my Volkswagen?
Repairs may involve replacing the MIL bulb, repairing damaged wiring, securing loose connectors, or, in rare cases, reprogramming or replacing the ECM.
7. Can I drive my Volkswagen with the P1691 code?
Yes, but it is not recommended, as the check engine light may not function properly, preventing you from being alerted to other critical issues.
8. How much does it cost to fix the P1691 code?
Repair costs vary but typically range from $50 to $200 for simple wiring repairs or bulb replacement. ECM repairs or replacements may cost significantly more.
9. Will clearing the P1691 code fix the issue?
Clearing the code will temporarily turn off the warning, but if the underlying issue isn’t resolved, the code will return.
10. Is the P1691 code common in Volkswagens?
It’s relatively uncommon but may occur in older models or vehicles with damaged wiring or electrical components.
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