P0697 OBD-II Trouble Code: Sensor Reference Voltage “C” Circuit/Open

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0697 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0697 code

P0697 is a diagnostic trouble code (DTC) for "Sensor Reference Voltage “C” Circuit/Open". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0697 DIAGNOSTIC Get a fair and transparent estimate upfront

diagnostic check engine light

P0697 code definition

The P0697 code is a generic powertrain code related to computer output circuit issues, including an internal computer failure. In this case, the engine control module (ECM) or other supporting control module has detected a fault with the sensor reference voltage “C” circuit.

Codes related to the P0697 include:

What the P0697 code means

A code P0697 will be stored when a fault is detected in the sensor reference voltage “C” circuit. The ECM may not be the only control module, including the body control module or fuel injection control module, to detect this particular fault. The “C” denotes a specific area of the circuit.

The 5-volt reference signal is sent to or from various control modules through the controller area network (CAN), which helps various components communicate in the vehicle. Your vehicle may require several drive cycles with this particular failure before a code is stored.

What causes the P0697 code?

Several problems may cause a P0697 code including:

What are the symptoms of the P0697 code?

Symptoms of a P0697 code may include:

  • Check engine or warning light may illuminate
  • The vehicle may not start
  • The vehicle may start, but with some difficulty
  • The engine may idle roughly
  • The vehicle may lack power during acceleration
  • The engine may run roughly during normal driving conditions
  • The engine may misfire
  • Decreased fuel economy

How does a mechanic diagnose the P0697 code?

A mechanic may use several methods to diagnose a P0697 trouble code, including:

  • Utilize an OBD-II scanner to check for a stored P0697 trouble code
  • Use a complete wiring schematic specific to your vehicle’s specific make and model
  • Visually inspect all related wiring and electrical components for damage
  • Use a specialized scanner, such as a Tech II, to help locate the general area of the fault
  • Use a memory saving device to ensure other controllers do not lose memory during reprogramming
  • Use a diagnostic CAN scanner to see pin values and which control modules are activating
  • Check for disconnected or defective or system grounds
  • Check for any corroded or loose electrical connectors that may be increasing circuit resistance

Common mistakes when diagnosing the P0697 code

It is always recommended to diagnose and repair codes in the order in which they are stored, as subsequent codes may simply be a symptom of a larger problem.

How serious is the P0697 code?

Because a vehicle’s safe driving operation most likely will be impacted due to faults that store a P0697 code, this code is considered a potentially serious code. When this code appears, it is recommended to immediately take your vehicle to your local service center or mechanic for repair and diagnosis.

What repairs can fix the P0697 code?

Several repairs can fix a P0697 trouble code, including:

Additional comments related to a P0697 code

Due to the complexity of trouble codes related to the controller area network (CAN), it is recommended to seek professional assistance in diagnosing and repairing your vehicle when this code is stored.

Additionally, remember that modules other than the ECM may also report a P0697. Be sure to visually locate the “C” sector along the circuit and thoroughly diagnose any possible causes for the fault prior to repair.

Need help with a P0697 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

P0697
trouble codes
OBD-II

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0697 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,901

Rating Summary
3,566
166
43
25
101
3,566
166
43
25
101

Tien

20 years of experience
746 reviews
Tien
20 years of experience
Very knowledgeable and excellent service.
2008 AUDI A3 - CHECK ENGINE LIGHT IS ON - BERKELEY, CALIFORNIA

Brett

7 years of experience
167 reviews
Brett
7 years of experience
Brett was awesome!
2009 CHEVROLET TRAVERSE - CHECK ENGINE LIGHT IS ON - AUSTIN, TEXAS

Ben

38 years of experience
912 reviews
Ben
38 years of experience
Mr. Smith was amazing! He was on time, knowledge, and quick! He is my new go to!
2014 FIAT 500L - CHECK ENGINE LIGHT IS ON - HOUSTON, TEXAS

Joe

40 years of experience
576 reviews
Joe
40 years of experience
2007 AUDI A4 - CHECK ENGINE LIGHT IS ON - TAMPA, FLORIDA

More related articles

How to Find the Keyless Code on a Ford Explorer or Mercury Mountaineer
Many Ford Explorers and Mercury Mountaineers were manufactured with an option known as the Ford keyless entry keypad. Some models refer to it as SecuriCode as well. It...
P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....

Related questions

Q: How many crankshaft position sensors are on a 2011 GMC Terrain?

Usually there will only be one crankshaft position sensor. However, there is also a camshaft position sensor as well. It is more likely that there is multiple cam sensors than crank sensors. It is possible for engines to have anywhere...

Q: OBD support

Hey there. If you have the OBD-2 connector under the dash directly under the steering column, then the ELM327 will work to scan the vehicle after you download the app. I can tell you that this adapter is very cheaply...

Q: Engine came on and we took it to Autozone. Code read P0430

Hello. This issue can be caused by a failing catalytic converter or by a bad oxygen sensor. As for driving the vehicle, if it is not lacking any power then it should be fine to drive. The only time a...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com