C0625 – Left Rear Position Sensor Malfunction

System: Chassis | Standard: ISO/SAE Controlled | Fault type: General

Official meaning: Left Rear Position Sensor Malfunction

Definition source: SAE J2012 naming/structure guidance

What Does C0625 Mean?

C0625 – Left Rear Position Sensor Malfunction is an ISO/SAE controlled, General chassis diagnostic trouble code that indicates the vehicle has detected a malfunction related to the left rear position sensor. The authoritative meaning is exactly: Left Rear Position Sensor Malfunction.

This code is set when a chassis-related control module determines that the left rear position sensor input is not acceptable for normal operation. The code definition does not specify the exact electrical failure mode (such as open circuit, short to ground, short to voltage, or out-of-range signal), and it also does not confirm that the sensor itself has failed. It only confirms that the system has identified a malfunction associated with the left rear position sensor signal or its supporting circuit/connection and that diagnosis is required to locate the fault.

Quick Reference

• Code: C0625
• Official Title: C0625 – Left Rear Position Sensor Malfunction
• Official Meaning: Left Rear Position Sensor Malfunction
• Fault Type: General
• Standard: ISO/SAE Controlled
• System: Chassis
• What it indicates: A detected malfunction affecting the left rear position sensor input used by the chassis system
• What it does not indicate: A guaranteed failed sensor, or a specific high/low/open/short condition without testing

Symptoms

When C0625 is present, symptoms depend on how the chassis system uses left rear position feedback and how the module responds to the malfunction. Possible symptoms include:

• Warning indicator/message: A chassis, suspension, stability, or traction-related warning lamp or message may appear.
• Feature limitation: Chassis-related functions that use position feedback may be reduced, limited, or disabled.
• Change in ride behavior: The vehicle may feel different over bumps or during load changes if a related chassis function is affected.
• Level/stance concerns: If position feedback is used for height-related strategies, the vehicle may appear uneven or not respond as expected.
• Intermittent behavior: The warning may appear and disappear if the malfunction is caused by an intermittent connection or wiring issue.

Common Causes

C0625 indicates a malfunction associated with the left rear position sensor. Common causes to consider during diagnosis include:

• Left rear position sensor issue: Internal sensor malfunction or output that is not acceptable to the control module.
• Connector problems: Loose connection, poor terminal contact, corrosion, moisture intrusion, or damaged connector locking/sealing.
• Wiring damage: Chafed, pinched, stretched, broken, or rubbed-through wiring in the sensor circuits.
• Power or reference supply fault: Missing or unstable supply to the sensor due to a circuit issue (for example, an open in a supply path).
• Ground circuit fault: High resistance, open ground, or poor ground connection affecting sensor operation.
• Signal circuit fault: Short to ground, short to voltage, or intermittent open in the sensor signal line.
• Mounting/mechanical influence: Sensor mounting damage, misalignment, or a mechanical condition that prevents the sensor from reporting position correctly (where applicable).
• Control module or input processing concern: Less common, but possible after confirming sensor power/ground and circuit integrity.

Diagnosis Steps

Because C0625 is a general chassis code with an ISO/SAE controlled definition, correct diagnosis depends on verifying the sensor circuit and the module’s interpretation of the signal. Use a scan tool capable of reading chassis DTCs and live data (if available), a digital multimeter, and the correct wiring information for the vehicle.

1. Confirm the code: Check that C0625 is stored. Record freeze-frame/failure records and note whether it is current, pending, or history.
2. Check for other DTCs: If additional chassis, power supply, or communication codes are present, diagnose in an order that addresses shared power/ground or network problems first.
3. Clear and recheck: Clear the code and perform a controlled recheck. If C0625 returns immediately, suspect a hard fault; if it returns only under certain conditions, suspect an intermittent issue.
4. Inspect the left rear position sensor area: Visually check the sensor body, mounting, and the harness routing near moving suspension components. Look for contact points, stretching, or physical damage.
5. Inspect the connector and terminals: Disconnect the sensor connector and check for corrosion, moisture, terminal damage, bent pins, or poor terminal tension. Confirm the connector is able to lock and seal correctly.
6. Verify power/reference and ground: Using the wiring diagram, measure the sensor supply (or reference) and ground at the sensor connector. If supply or ground is missing or unstable, locate the circuit fault before condemning the sensor.
7. Check the signal circuit for shorts/opens: With appropriate connectors disconnected, test the signal circuit for a short to ground, short to voltage, and continuity from the sensor connector to the module-side connection point.
8. Use scan data to evaluate the sensor (if supported): Observe the left rear position sensor parameter. A value that is fixed, erratic, out of expected range, or inconsistent with vehicle movement supports a sensor/circuit/mounting problem.
9. Perform an intermittent fault check: Carefully manipulate the harness and connector while monitoring the signal (wiggle test). A reading that drops out or spikes during harness movement points to wiring/terminal issues.
10. Reassemble and verify: After repairs, clear codes and confirm the system no longer sets C0625 under conditions that previously triggered the malfunction.

Possible Fixes

Fixes for C0625 depend on what testing proves. Appropriate repairs may include:

• Repair wiring damage: Restore damaged conductors, insulation, and routing/retention so the harness is protected from movement and abrasion.
• Service connector/terminals: Clean corrosion, address moisture intrusion, repair or replace terminals as needed, and ensure proper connector seating and locking.
• Restore correct power/ground: Repair the supply/reference or ground circuit issues found during testing, including high resistance connections.
• Replace the left rear position sensor: Replace the sensor only after confirming the circuit, power, and ground are correct and the sensor is the proven fault source.
• Correct mounting/mechanical issues: Repair or secure the sensor mounting and related hardware so the sensor can report position accurately (where applicable).
• Follow required setup steps: If service information requires calibration or relearn after repair, perform the specified procedure.

Can I Still Drive With C0625?

C0625 is a chassis code indicating a malfunction in the left rear position sensor input. Whether driving is advisable depends on how the vehicle responds to the malfunction and whether any chassis-related functions are limited.

• If the vehicle drives normally and only a warning is present, limited driving may be possible, but the condition should still be diagnosed promptly because the chassis system has identified a sensor malfunction.
• If you notice changes in stability, handling, ride behavior, or if multiple chassis-related warnings are present, reduce driving and prioritize diagnosis.
• If the vehicle exhibits unsafe handling characteristics or an abnormal stance/level condition, do not continue driving until the cause is identified and corrected.

Repair Costs

Repair cost depends on whether the confirmed root cause is a sensor, connector issue, wiring problem, mounting influence, or module diagnosis time.

Related Sensor Position Codes

Compare nearby sensor position trouble codes with similar definitions, fault patterns, and diagnostic paths.

• C0695 – Position Sensor Overcurrent (8 volt supply)
• C0630 – Right Rear Position Sensor Malfunction
• C0620 – Right Front Position Sensor Malfunction
• C0615 – Left Front Position Sensor Malfunction
• C0305 – Front Speed Sensor Malfunction
• C0300 – Rear Speed Sensor Malfunction