Code
P1163
PEUGEOT
P — Powertrain
Exhaust gas recycling incorrect flow detected
Views:
UK: 0
EN: 1
RU: 2
AI status
Completed
Completed
100%
Causes
- Carbon/clogging in EGR valve, passages, cooler or intake manifold restricting flow
- Sticking or mechanically faulty EGR valve (stuck closed or open)
- Faulty EGR position/sensor or differential pressure sensor used to measure EGR flow
- Blocked or collapsed vacuum/actuator lines (vacuum‑actuated systems)
- Faulty EGR control solenoid or wiring/connectors (open, short, corrosion)
- Intake or exhaust leaks affecting pressure signals (leaky PCV, cracked intake, exhaust leak)
Symptoms
- MIL (check engine light) illuminated
- Rough idle, hesitation or reduced drivability under light load
- Loss of power or poor acceleration (especially at part throttle)
- Increased NOx emissions and possible failed emissions test
- Surging, stalling or excessive smoke (if EGR stuck open)
What to check
- Read freeze frame and live data: EGR commanded vs actual position/flow/pressure differential
- Check stored pending/continuous codes and recent fault history
- Visual inspection of EGR valve, pipes, cooler and vacuum/electrical lines for damage or leaks
- Check electrical resistance and continuity of EGR actuator, solenoid and sensors
- Inspect connectors for corrosion, water ingress or bent pins
- Perform smoke test or pressure/vacuum test to detect intake/exhaust leaks
Signal parameters
- EGR valve position feedback: typically reported as percentage (0–100%). Expect near 0% when closed; partial opening under light load (approx. 10–40%) depending on engine and conditions
- Differential pressure across EGR cooler or sensor: often a few mbar to a few tens of mbar when EGR is flowing (exact value manufacturer dependent)
- EGR command duty cycle or control voltage: 0–100% duty (or 0–12 V) depending on actuator type
- MAP/MAF signals and long/short term fuel trims should be consistent with commanded EGR flow (large unexpected trim changes indicate intake/measurement issues)
Diagnostic algorithm
- Connect a scan tool, record freeze frame and live data for EGR command, EGR feedback/DP sensor, MAP/MAF, engine speed, load and fuel trims.
- Reproduce condition: monitor data while engine at the load/temperature where fault sets. Note discrepancies between commanded and measured flow/position.
- Visually inspect EGR valve, cooler, and passages. Remove EGR valve to check for carbon blocking and free movement. Clean if moderate deposits are present.
- Check actuator operation: apply vacuum (vacuum systems) or commanded current/duty (electrical actuators) and observe valve movement and sensor feedback.
- Test differential pressure or EGR position sensor: verify voltage/volts-per-bar output, continuity and compare to expected values with valve open/closed.
- Inspect and test EGR control solenoid, related vacuum lines or wiring harnesses for continuity, shorts to ground/power and damaged connectors.
- Check for intake or exhaust leaks (smoke test) and for clogged EGR cooler or return passages in intake manifold.
- If components fail tests, replace faulty parts (EGR valve, sensor, solenoid, or hoses). If deposits present, perform cleaning or replace EGR cooler as needed.
- Clear codes and perform road test to confirm proper EGR operation and that the fault does not return. Re-scan to verify.
Likely causes
- Carbon buildup blocking EGR passages or valve
- Sticking/faulty EGR valve or cooler
- Faulty differential pressure or EGR position sensor
- Electrical fault in EGR actuator control (connector, wiring, solenoid)
Fault status
Status
Engine control module detected incorrect EGR flow vs expected values for current operating conditions and stored DTC P1163 (Exhaust gas recycling incorrect flow detected).
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email