What is P0690 : Engine Error code Causes Explained
The P0690 engine error code signals a malfunction in the electronic engine control circuit. Understanding its causes, symptoms, and risks helps vehicle owners address problems promptly and avoid serious damage.
How to Identify a DTCs Number
Understand, this trouble codes (DTCs) are 5 characters: 1 letter, 4 numbers. P-Powertrain indicates the fault code’s location. Generic or manufacturer-specific codes are indicated by the first digit. The second digit denotes the subsystem (7=transmission). The last two numbers describe the issue.
To identify a DTC’s number like P0690, you need an OBD-II scanner or diagnostic tool connected to the vehicle’s diagnostic port. Once connected, the scanner communicates with the PCM to retrieve the stored error codes, displaying them with their specific number and description, allowing you to pinpoint the exact issue for further inspection or repair.
Causes of P0690 Error Code:
- Faulty ECM/PCM Power Relay:
The relay itself might be failing, causing intermittent or no power to the ECM/PCM. - Wiring Issues:
Damaged/corroded wires in the relay control circuit cause voltage fluctuations or open circuits. - ECM/PCM Issues:
In rare cases, the ECM/PCM itself could be faulty and misinterpreting the voltage readings. - Faulty Fuses:
A blown or faulty fuse related to the ECM/PCM power relay circuit can cause the code to be set.
Risk Level of P0690 Error Code:
The P0690 engine error code indicates a problem with the ECM/PCM “Internal Control Module Engine Off Timer Performance,” and it is considered a high-risk level because it can directly affect your engine’s performance and drivability.
Immediate inspection and repairs are strongly recommended to prevent further damage and ensure vehicle safety.
Common Car Brands Affected by P0690 Code:
The P0690 code can affect various vehicles; it is most commonly associated with:
- Ford
- Chevy
- Cadillac
- Mercedes
Video: P0690 Engine Error code
FAQ’s
What is P0690 Engine Error Code?
P0690 indicates a Fan Control Circuit Malfunction, meaning the engine control module has detected an issue in the electrical circuit controlling the cooling fan.
What causes the P0690 Engine Error Code?
This code can be caused by a faulty cooling fan, damaged wiring or connectors, blown fuses, or a malfunctioning engine control module.
What is the Risk Level of P0690 Engine Error Code?
The risk level is High, as a malfunctioning fan can cause engine overheating, reduced performance, or long-term engine damage if ignored.
Which vehicles are affected by P0690 Engine Error Code?
Vehicles from Ford, Chevy, Cadillac and Mercedes with electronically controlled cooling fans commonly experience this error code.